18.According to the author, we cannot sleep well when we ().

A. 　 treated

B. 　 adjusted

C. 　 adopted

D. 　 remedied

A. 　 it is true that life in New York is much faster than that in any other city

B. 　 people living outside big cities are lazy and miserable

C. 　 most American people enjoy living in the suburbs of big cities

D. 　 those who are busy are not necessarily unfriendly

A. 　 human faces have complex features

B. 　 people differ in their behavioral and physical characteristics

C. 　 human fingerprints provide unique information

D. 　 people’s behavior can be easily described in words

A. 　 how individuals can help make a difference

B. 　 running a neighborhood meeting to solve its problems

C. 　 citizens＇ reactions to the problems they face

D. 　 solving problems through group action

A. 　 the differences between robots and men

B. 　 the reason why men need to sleep

C. 　 about the need for robots to save power

D. 　 about the danger of men working at night

A. 　 each

B. 　 some

C. 　 certain

D. 　 any

A. 　 are directly related to pleasure

B. 　 will meet their physical needs

C. 　 will bring them a feeling of success

D. 　 will satisfy their curiosity

A. 　 captured

B. 　 cost

C. 　 cast

D. 　 chased

A. 　 scolded

B. 　 charged

C. 　 accused

D. 　 punished

A. 　 get to

B. 　 hold to

C. 　 lead to

D. 　 see to