Revise the following sentences according to the requirements.

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.

Only thirty percent of the local people owned cars at that time. ( periodic sentence)

He came too late, so he did not see the first part of the play. ( simple sentence)

They are true sisters. It is clear from the facial resemblance between them. ( sentence with a subject clause)

He left the room and hummed a tune. (sentence with a verb-ing phrase)

The girl cried sadly as she was locked outside. (sentence with a verb-ed phrase)

The professor came into the classroom. He had two books in his hand. (prepositional phrase)

He knocked the door again and again. There was no answer. (compound sentence)

I wrote this letter yesterday. I forgot to post it. (complex sentence)

I had planned to go to Australia last summer. It was too expensive. I went to Vietnam instead. ( compound-complex sentence)

The boy can sing very well. He can also dance very well. (sentence with parallel structure)

Correct the errors in the following sentences.

Example: Made by his mother, Tony ate up the cake.

 Tony ate up the cake made by his mother.

Small businesses often grow into large ones. Adding to the economy vitality.

Failure turns out to be a valuable learning experience for those. Who may be successful the second or third time.

Americans buy many things on credit, stocks are no exception.

 Having got the land, the laws were changed by the farmers.

Their requests include railroad regulations, tax deductions and to make education cheaper.

Choose the best topic sentence from the group below by writing A, B, C or  D.

A. There are different types of social worker careers.

B. A social worker can help a child find a home.

C. A mental health social worker helps people deal with depression.

D. A medical social worker helps people with diseases.

Read the following paragraph and underline the topic sentence.

The central role of women in horticultural (农耕) societies tends to have political and sociological consequences. It is the women who own and manage their garden plots and pass them on to the next generation. It is the women who decide when their soil is depleted and where the village should move to clear more fertile ground. One of the more interesting aspects of horticultural societies is that it is often women who exercise political power and authority in their society. Anthropologists (人类学家) and travellers alike call attention to the special standing and respect that women enjoy in Austronesian cultures generally and the Philippines in particular. The honored position of women in Austronesian and Philippine society, more than likely, remains a legacy (遗产) from their, not so distant, horticultural prehistory.

Read the following paragraph carefully and choose the best topic sentence from the four possible answers that follow the paragraph by writing A, B, C or  D.

Since there are more than 80 million current and former smokers in the United States, a widespread CT scanning program of at-risk individuals would De enormously costly. Low-dose CT scans also expose patients to considerably more radiation than standard chest X-rays do, and little is known about how the cumulative risks of years of such scans would balance out with the benefits of the information they provide. Also, more scans would also mean more false positive results, leading to more additional tests and surgical procedures performed on people who do not turn out to have any disease, further complicating the picture.

A. CT scans should be improved in more than one way.

B. CT scans can be very costly in the United States.

C. CT scans may not present clear picture for patients and doctors.

D. There are disadvantages in using CT scans to fight diseases.