学科：高中英语
版本：人教版
年级：高三下册
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发布时间：2010-03-29
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21. I was halfway back to the hospital where the doctor was working______Susan caught up with me.

A. when B. while C. until D. though

22. —John, how did your English exam go？

—I thought I________have failed, but in fact I came in the top 10 in the class.

A. should B. couldn’t C. might D. mustn’t

23 --- When will you be through with your work, Jones?

---_______? My boss usually finds something for me to do at the last minute.

A. Would you help me B. Who knows C. I beg your pardon D. Anything the matter

24. Carbon dioxide____from burning fuels is the most common of the so – called greenhouse gases.

A. producing B. having been produced C. to be produced D. produced