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.
18. 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.
Your choice:__________
