21.  When I met him the other day，it was the first time we ________each other since we were at school.
A．saw　 　　　　 B．had seen 　　 C．were seeing　 　　 D．have seen

It ________ have been Tom that parked the car here，as he is the only one with a car.

A．may 　　　　　 B．can　　　　　　　 C．must 　　　　　D．should

An earthquake happened in Haiti on Jan.12,2010,　　 many countries in the world paid close attention to.

A. where B. when C. which D. what

—What about the football match last night？

—______.I might as well have stayed at home and had a good rest.

A.It couldn’t have been any better　　　　　　 B.It couldn’t have been any worse

C.It was the best one　　　　　　　　　　 D.There was no better one

There was so much noise in the room that the speaker couldn’t make himself _____.

A. being heard       B. hearing         　 C. heard　　　     D. hear

Students in our school are encouraged to ________ more activities after class in order to broaden their knowledge.

A. attend 　　　　　　　　　　 B. join

C. take part 　　　　　　　　 D. participate in

When　　　　　　　　　　 (比较不同的文化)， we often pay attention only to the differences without noticing the many similarities.(compare)

Without the air to hold some of the sun’s heat, the earth at night 　　　　　,too cold for us to live.
A. would be freezing cold　　　　 B. will be freezing coldly
C. would be frozen cold　　　　　 D. can freeze coldly

Ahead of me I saw a woman _____ I thought was my aunt.

A. who 　 B. whom　 C. of whom 　 D. whose