Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions:
The cause of tooth decay is acid, which is produced by bacteria in the mouth. The acid removes minerals from tooth enamel, allowing tooth decay to begin; the saliva in your mouth encourages remineralization and neutralizes the acid. The rate at which bacteria in the mouth produce acid depends on the amount of plaque on the teeth, the composition of the microbial flora, and whether the bacteria of the plaque have been "primed" by frequent exposure to sugar. To keep your teeth healthy, a regular dental hygiene program should be followed.
Removing plaque with a toothbrush and dental floss temporarily reduces the numbers of bacteria in the mouth and thus reduces tooth decay. It also makes the surfaces of the teeth more accessible, enabling saliva to neutralize acid and remineralize lesions. If fluoride is present in drinking water when teeth are forming, some fluoride is incorporated into the enamel of the teeth, making them more resistant to attack by acid. Fluoride toothpaste seems to act in another way, by promoting the remineralization of early carious lesions.
In addition to a regular dental hygiene program, a good way to keep your teeth healthy is to reduce your intake of sweet food. The least cavity-causing way to eat sweets is to have them with meals and not between. The number of times you eat sweets rather than the total amount determines how much harmful acid the bacteria in your saliva produce. But the amount of sweets influences the quality of your saliva. Avoid, if you can, sticky sweets that stay in your mouth a long time. Also try to brush and floss your teeth after eating sugary foods. Even rinsing your mouth with water is effective. Whenever possible, eat foods with fiber, such as raw carrot sticks, apples, celery sticks, etc., that scrape off plaque, acting as a toothbrush. Cavities can be greatly reduced if these rules are followed when eating sweets.

The word "scrape off" is closest in meaning to

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
CesarJimenez
11 Greenway Court, Apt. 4G
Franklin, WI 53133
Dear Mr.Jimenez,
Your supervisor and (1)------- have reviewed your request to extend your hours from 20 hours to 40 hours per week. Based on the high quality of your performanceand the needs of your department, we have agreed to the time increase, effective January 2. The enclosed benefits booklet details the compensation that will be available to you as a full-time employee. Be sure to read this information (2)------- and submit the necessary paperwork before January 2. In the meantime, please meet with your supervisor to discuss how this change (3)------- your job responsibilities.Should you have any questions regarding your benefits or hours, I am available by phone (414-555-0186) or e mail (d_richards@haroldsonelectric.com).
Sincerely,
Deborah Richards
Director,Human Resources

Choose the best answer:
My friend/ never/ ride/ horse/ before.

It was so relaxing to be ________ old friends.

(521)____

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions :
Laughing is good for the body and the mind. When we laugh we breathe more oxygen into our body, (1) _______ helps to keep us healthy. Endorphins, or happy chemicals, are released in the body, and you feel more relaxed and happy. Laughter also brings people together to (2) _______ some fun. Companies who have run laughter yoga workshops find that they have advantages for both employers and employees. People who are happy at work are more hard-working and (3) _______more money for the company. Also, people who can laugh together (4) _______more successfully. In general, people do better at work when they feel happy and relaxed. A Danish company who used Laughter Yoga for a year reported an increase (5) _______sales of 40 percent over the previous year. Following Laughter Yoga session, a Hawaiian timeshare company reported the highest sales of the year – double their target figures.

Choose the best answer:
The ____________ will announce tomorrow’s weather on TV at 7:30 tonight.

Read the passage below carefully, and then choose the best answer:
Getting Curious about Curiosity’s Mission to Mars
The topic of space exploration reached a high point during the 1960s, as Soviets and Americans competed for dominance. Yet after the Soviets put the first man in space and Americans landed the first men on the moon, many people lost interest as nothing else could compare to these groundbreaking accomplishments. Recently, a robotic rover on a mission to Mars has generated massive interest the public. Curiosity is a robotic car-sized rover that is part of NASA’s long-term plan to learn more about the terrain and conditions on the Red Planet. One of its main goals was to determine whether or not it was possible for life to develop on Mars. Using mechanical arms, Curiosity can gather soil and rock samples from the ground and analyze them to determine their chemical composition. Since transporting around Mars was vital to the success of the mission, a lot of effort was put into Curiosity’s transportation abilities. Mars’ terrain is not smooth, so designers enabled Curiosity to roll over bumpy areas. Once Curiosity left the Earth, there would be no opportunities to repair it, so engineers also had to be spot on about Curiosity’s power solution. Therefore, they devised a system that can generate power internally from a radioisotope generator. Finally, to capture stunning pictures of Mars, Curiosity was equipped with several state-of-the-art cameras. The cameras also help the rover avoid hazards, navigate, and detect information about the atmosphere. After a 350-million-mile journey, Curiosity landed on Mars in 2012, an impressive 1.5 miles away from its initial target. Upon arrival, NASA’s website crashed due to an overload of visitors. People just couldn’t seem to get enough information on the mission. But the real thrills came in the weeks and months that followed, as people got their first real glimpse about what life was really like on Mars. The mission was originally supposed to last for two years, but scientists are now optimistic that it could continue for up to 15 years, depending on Curiosity’s condition. No matter what happens at this point, it is safe to say that Curiosity’s mission to Mars has been a smashing success.
2. Why did _Curiosity_ have arms?

Read the following passage and choose the best answer (A, B, C, D):
The ubiquitous bar code, developed more than twenty years ago, is not a stagnant product. On the contrary, the technology has been improved so that it can be used more efficiently. Much less expensive than a computer chip, the bar code can hold more information than it had in the past by adding a second dimension to the structure. The bar code consists of a series of parallel vertical bars or lines of two different widths, although sometimes four widths are used, printed in black on a white background. Barcodes are used for entering data into a computer system. The bars represent the binary digits 0 and 1, just like basic computer language, and sequences of these digits can indicate the numbers from 0 to 9, which can then be read by an optical laser scanner and processed by a digital computer. Arabic numbers appear below the code. The traditional bar code has been used to monitor skiers at ski lifts and to determine price and perform inventory control on groceries, drugs, medical supplies, manufactured parts, and library books to name a few. The bar code used on grocery products, introduced in the 1970s, is called a universal product code (or UPC) and assigns each type of food or grocery product a unique code. The five digits on the left are assigned to a particular manufacturer or maker and the five digits on the right are used by that manufacturer to identify a specific type or mark of product. Traditional single dimension bar codes are not readily customizable because there is little extra space. The two-dimensional bar code, with an information density of 1,100 bytes, allows a considerably greater amount of information to be coded than does the traditional bar code, including customized information. [A] It also has built-in redundancy, meaning that the identical information is duplicated on the same code. [B] Therefore, if the code is damaged, it can still be read. [C] The technology even allows pictures or texts to be contained within the code, as well as bar code encryption. [D] The new technology dramatically reduces the errors of the single dimensional bar code and reduces the enormous costs that some companies have reported in the past. 
2. The word "stagnant" in the first sentence is closest in meaning to: 

Choose the best answer:
_________it was so cold, he went out without an overcoat.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:
We tend to assume that people like Shakespeare or Darwin owe their success (1)__________ their genius. In his new book, Outliers, Malcolm Gladwell suggests that the truth may be more complex. Of course, all successful people are bound to have some natural (2)__________. But the true (3)__________ of success are most probably hard work, opportunity, and the environment you grow up in. You need about 10,000 hours of practice before you get really good at something. Mozart’s early work was certainly not great or (4)___________. By the time he composed his first true masterpieces, he must have spent about ten years imposing concertos. But hard work is not enough, you have to get your chance. Most Silicon Valley tycoons, like Bill Gates or Steve Jobs, were born around 1955. When the personal computer revolution came twenty years later, they were at a(n) (5)__________ age to lead it.

Read the following passage and choose the best answer (A, B, C, D):
Why is it that many teenagers have the energy to play computer games until late at night but can’t find the energy to get out of bed (1) ________ for school? According to a new report, today’s generation of children are in danger of getting so (2)_______ sleep that they are putting their mental and physical health at (3)_______. Adults can easily survive on seven to eight hours’ sleep a night (4)_____teenagers require nine or ten hours. According to medical experts, one in five youngsters (5)________ anything between two and five hours’ sleep a night less than their parents did at their age.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.
                          VIRTUAL DOCTORS
 Clare Harrison rarely falls ill and hates going to the doctor’s when she does. So when she recently(1)........... out in a painful rash down one side of her body she emailed her symptoms, (2)..................  also  included a (3)...................... fever, to e–doc, the internet medical service. Two hours later she was diagnosed as having shingles (Herpes Zoster) by her online doctor, who prescribed a special cleansing solution for the rash and analgesics to help relieve the pain.
Health advice is now the second most popular topic that people search for on the internet, and online medical consultation is big business. Sites vary enormously in what they offer, with services ranging from the equivalent of a medical agony aunt to a live chat with a doctor via email. They are clearly (4)....................... a demand from people who are too busy or, in some cases, too embarrassed to discuss their medical (5)..................... with their GP.

(2).........................

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
Azmah, Inc., Hits a Record
1 May - Azmah, lnc., one of Malaysia's leading electronics manufacturers, announced yesterday that it achieved record safes in the last quarter. Azmah's revenue jumped 18 percent to RM 144 million, with the increase largely (1)------- by television sales. Sales of flat-screen models alone rose nearly 30 percent over sales figures from the previous quarter. (2)-------, production costs also reached record highs. Azmah reports its profit margins have been reduced by 20 percent because of the rising prices of computer chips and other electronic (3)------

Choose the best answer:
Co Loa was the capital of Early Ngo Dynasty, ___________ in fact it only existed with the proper function of a capital in 6 years under Ngo Quyen’s reign.

Choose the best answer:
People in this region ________ mainly rice and vegetables.

A ..................... friendship is a precious relationship.

(527)_______

 Choose the best answer:
If you’ve got a headache, why don’t you try _______an aspirin?

Choose the best answer:
Nam/ like/ order/ two/ milk.

 I think the match ______ . Everybody’s gone into the stadium and you can hear them cheering.

(399)_______

By the end of this month, Henry … for 1 year.

(113)______

Choose the best answer:
Ms. Black and Ms. White are talking about Mr. Brown’s upcoming retirement.

Ms. Black: “Mr. Brown is going to retire next month.”

Ms. White: “ _______________”.