47.Although he had looked through all the reference material on the subject, he still found it hard to understand this point and her explanation only () to his confusion.

A. 　 are worrying about our safety

B. 　 are overworked

C. 　 are in a tent

D. 　 are away from home

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. 　 mean

B. 　 assume

C. 　 hope

D. 　 suppose

A. 　 Evolution has equipped all creatures with a regular pattern of sleeping and waking.

B. 　 The study of sleep is an important part of the evolutionary theory.

C. 　 Sleeping patterns must be taken into consideration in the designing of robots.

D. 　 The sleeping pattern of a living creature is determined by the food it eats.

A. 　 specific

B. 　 dynamic

C. 　 heroic

D. 　 diplomatic

A. 　 You should be kind to your neighbors and they will treat you the same way.

B. 　 Everyone can play his own part to make things better.

C. 　 All small acts will add up to kindness.

D. 　 It＇s a small act to help a person in need.

A. 　 add

B. 　 calculate

C. 　 add to

D. 　 calculate on

A. 　 by

B. 　 in

C. 　 under

D. 　 with

A. 　 interfered

B. 　 offended

C. 　 impressed

D. 　 bothered

A. 　 of

B. 　 for

C. 　 with

D. 　 to