Many hundred years ago, there were many villages and little towns in England

The most common form of treatment it  is mass inoculation and chlorination of water sources.

VOCABULARY AND STRUCTURES: Choose the best options 

Remember _______ the letter for me tomorrow. 

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

The play was very long, but there were two_________.

As the numeral of older people increases, services for the elderly will soon represent one of the fastest-growing areas of employment

Alike other forms of energy, natural gas may be used to heat homes, cook food, and even run automobiles.

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

Bacteria lived in the soil play a vital role in recycling the Carbon and Nitrogen needed by plants.

Advertising it provides most of the income for magazine, newspapers, radio, and television in the United States today.

That he take this course _    very certain.

More progress in gender equality will be made ___________ the Vietnamese government.

Some birds can travel at speeds approaching one hundred miles an hour, and a few land animals can so.

In the 1800’s botanist Asa Gray worked to describe and classifying the plants found in North America.

Those who have never been abroad is eager to see how different the other cultures are.

The extraordinary beautiful of orchids makes them the basis of a multimillion-dollar floral industry.

Several comet are discovered each year, but very few of them are bright enough to be seen without the aid of magnification.

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

Choose the best option to complete the sentences: Reducing the size of classes may improve _______ standards.

Find the mistake: As soon as you leave the room, don’t forget turning off the lights.

That investors in the stock market enjoys increases and suffer declines is simply a fact of the financial market, and a smart investor is not too excited about the former or crestfallen about the latter.

Find the ONE among the underlined and marked A, B, C, D in each of the following sentences that needs correcting:

Many films whose are about violence are harmful to our children.