18、–Why does the lake smell terrible?

– Because large quantities of water       .  

A. have polluted                      B. is being polluted

C. has been polluted                   D. have been polluted

17、–How amazing it is that astronauts are exploring outer space!

–It’s a challenge, I guess,         man against nature.

A. of          B. for          C. by          D. about

16、It’s helpful to put children in a situation         they can see themselves differently.

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

15、For a moment nothing happened. Then        all shouting together.

A. voices had come                   B. came voices

C. voices would come                 D. did voices come

14、–Your mum is very kind.

–Yeah, my mum is pretty considerate, you know what        , she always arranges everything around me.

A. she means        B. you mean        C. I mean        D. we mean

13、We are at your service. Don’t           to turn to us if you have any further problems.

A. beg         B. hesitate        C. desire         D. seek

12、The Somali robbed frequent attacks on the sea urged the United Nations to all nations         to take immediate action.

A. fight for        B. apply for         C. call on         D. wait on

11、The World Health Organization gave a warning to the public without any         when the virus of H1N1 hit Mexico in April, 2009.

A. delay          B. effort          C. schedule        D. consideration

10、It seems that living green is          easy and affordable. A small step makes a big difference.  

A. exactly        B. fortunately        C. surprisingly         D. hardly

9、According to the literary review, Shakespeare        his charities live through their language in his plays.

A. will make       B. had made        C. was making        D. makes