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. 

Topic sentence : _________________________

The way in which people use social space reflects their social relationships and their ethnic identity. Children often sleep with parents, and brothers or sisters share a bed. Early immigrants to America from Europe brought with them a collective style of living, which they retained until late in the 18th century. Historical records document a group-oriented existence, in which one room was used for eating, entertaining guests, and sleeping. People ate soups from a communal pot, shared drinking cups, and used a common pit toilet. In Mexico, the meaning and organization of domestic space is strikingly different. With the development of ideas about individualism, people soon began to shift to the use of individual cups and plates and the use of private toilets. They began to build their houses with separate rooms to entertain guests, separate bedrooms for sleeping, separate work areas, and separate bathrooms.

Write a letter according to the following situation: you (Zhang Liming) were told by Mr. Liu Kai, Manager of the Business Book Publishing, that Yuren Publishing House is expecting to make some additions to its accounting staff and you decide to apply for the post. In your letter, make sure you mention your qualifications and previous experience relevant to the job. You should also express your hope to get an interview and your willingness to provide any information if necessary. Remember to leave your mobile phone number (136××××××43) for further contact. (150-200 words )

19 Imitative words are words that sound like the thing or action they stand for.

20 The other one fifth is made up partly of borrowed words and partly of three other kinds of words: words from the names of peoples and places; imitative words; and invented words.

21 But there are probably more.

22 The old words which were born centuries ago in the Anglo-Saxon, Germanic and French languages make up four fifths of the English language.

23 Scholars guess that English has about 600, 000 words.

24 There is no need to say anything about these words, for they speak for themselves.

25 Ampere, volt and watt are all units of electricity, and they are named for the men who discovered them.

26 New words continue to come into the language at such a rate that no dictionary could possibly keep up with them.

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. 

Topic sentence : _________________________

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.

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.

Answer:_________________________

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

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

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