Revise each of the following sentences according to the requirement in brackets．

Example: The history of English words is the history of our civilization in many ways. (periodic sentence)

In many ways, the history of English words is the history of our civilization.

Learning a new language demands time. It needs patience too. (simple sentence)

Bacon stepped to the front of the room. He tripped over the microphone cord. (compound sentence)

 Harrison’s Chemical Corporation is a company. It sponsors important research. (complex sentence)

We looked at only two houses before buying the house of our dreams. (periodic sentence)

Pigeons adjust to farm life. They adjust to city streets. In city streets they peck their livelihoods from garage heaps. (compound-complex sentence)

She was greatly disappointed to find that the picture did not look like her. (sentence with to opener)

He cut the grass. She trimmed the bushes. The children swept the clippings and put them into plastic bags. (long sentence)

She stood there. She watched the fair woman walk down the long line of galleries with grace and majesty. (sentence with a modifying phrase)

 Tom went to college. His brother James didn’t. James had a very weak heart. (compound-complex sentence )

 After losing his glasses，Tom drove down the wrong side of the street. He ran a stop sign，and went through two red lights. (sentence with parallel structure)

Correct the errors in the following sentences．

Example: After seeing an offensive mouthwash ad on television. I resolved never to buy that brand again.

After seeing an offensive mouthwash ad on television，I resolved never to buy that brand again.

Mr. Baker used to teach arts in Memorial High School I used to be a student there.

My parents bought a house from a man with no inside plumbing.

The World Wide Web is easy to use. Loaded with links and graphics.

To please the children，some fireworks were set off a day earlier.

The tribe emphasized collective survival，mutual aid and being responsible for one another.

Choose the best topic sentence from the four options below. Write the corresponding letter of your choice in the blank provided.

A、 Each of us inherits a culture made up，in part，of commonly accepted knowledge.

B、We may also learn that eating too much candy will decay our teeth.

C、We may learn from others that the earth revolves around the sun.

D、 These are the things that everybody knows.

Read the following paragraph and underline the topic sentence.

Paraphrasing，as well as quotation，is an essential skill in writing research papers. Paraphrasing is used for different purposes. Some paraphrases will be designated to support already existing evidence. Others will reinforce argumentation against evidence. Still others will help to develop existing arguments and provide back-up for any conclusion drawn in the course of writing. Depending on the function，paraphrases will be introduced in accordance with their unique context.

Read the following paragraph and choose the best topic sentence from the four options that follow. Write the corresponding letter of your choice in the blank provided.

Most adults sleep between seven and nine hours，but occasionally people turn up who need twelve hours or so，while some rare types can get by on three or four. Rarest of all are those legendary types who require almost no sleep at all; respected researchers have recently studied three such people. One of them—a healthy，happy woman in her seventies—sleeps about an hour every two or three days. The other two are men in early middle age，who get by on a few minutes a night. One of them complains about the daily fifteen minutes or so he’s forced to “waste” in sleeping.

A、Sleep is a waste of time.

B、Adequate sleeping hours are essential for most adults.

C、Adults and teenagers vary widely in their sleeping habits.

D、A fact about sleep is that individual needs for it vary widely.