Fee Nitrogen is chemically inert and combines with other elements only since very high temperature or pressures

Because studies have shown that obesity can cause a type of diabetes, doctors usually put his diabetic patients on a special diet.

The Irish potato famine of 1845 and 1848 were some of the worst in that country’s history and led to thousands of deaths and mass emigration

The fossil remains of much extinct mammals have been found in the tarpits at Rancho La Brea in Los Angeles.

For many years, scientists studying the effects that the sun has on human skin.

Alcoholic beverages vary widely in content, ranging from only 2 or 3 percent for some light beers to as high to 60 percent for some vodkas and brandies

 I use a laptop __________ to music and watch videos.

A telephone, a satellite TV, a fridge and the other facilities are available in our hotel rooms.

Many scientists contributed to the development of television, whether no one can be said to have invented it.

Choose the best options

Radio provides information orally and we receive information aurally.

Choose the word/phrase (A, B, C, D) that best fits the space in each sentence:

Mai and Lan are attending a party.- Mai: "Would you like some more Coke?" -

Lan: " _______ ."

Choose the best answer:

Do you take part                     the school football team?-No, I cannot play football so well.

Tell me ...................... you want and I will try to help you.

Identify the error in each sentence: (A) Life is not (B) easy for those who (C) is (D) unemployed.

Identify the one underlined word or phrase A, B, C, or D that must be changed for the sentence to be correct: 

Most countries depend to few extent on cereal imports to augment their own crops. 

The novel and the short story are the literary forms most commonly called “fiction”, but contemporary narrative poetry and dram were also forms of fiction.

He was so careless that he left the work half doing and went to the cinema.

Choose one word or phrase marked A, B, C, or D that best complete the preceding sentence:

He retired early_____________ ill health.

Choose the best answer: 
What a(n)............. news! Thousands of people have died in the quake.

When she retires in September 1989, tennis champion Christine Evert was the most famous woman athlete in the United States.

VOCABULARY AND STRUCTURES: Choose the best options 

The prefix “sub’ in the word “submarine” mean: