31.The engineers in this lab spent several weeks () their plans for the new bicycle.

A. 　 A.brain

B. 　 B.heart

C. 　 C.mind

A. 　 incapable

B. 　 indispensable

C. 　 insensible

D. 　 infinite

A. 　 aroused

B. 　 arose

C. 　 raised

D. 　 rose

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. 　 are the most common three means

B. 　 are the most three common means

C. 　 are the three most common means

D. 　 are three the most common means

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. 　 departure

B. 　 fault

C. 　 foundation

D. 　 acceptance

A. 　 to

B. 　 against

C. 　 for

D. 　 out

A. 　 must have got through

B. 　 would have got through

C. 　 would get through

D. 　 could get through

A. 　 Psychologists.

B. 　 The modern TV audience.

C. 　 The ancient Greek audience

D. 　 The movie star.