21. I was very tired.Otherwise,I ______ to the theatre with you.
A. had gone
B. would go
C. went
D. would have gone
答案：D。解析，otherwise是指“若和上文所说事实相反的话”，本句要求用表示过去情况的虚拟式。
22. ______ gathering and storing information,the computer can also solve complicated problems.
A. Not only
B. Except
C. Unless
D. Besides
答案：D。解析，介词besides表示“除…之外还…。”不能选B，except表示排除
23. The airport is five miles ______.
A. from here far
B. from here away
C. far from here
D. away from here
答案：D。
解析，five miles away from here是“离这里5英里”的意思。不能选C，far from here是“离这里甚远”，前面不可加里数。
24. They showed me the spot ______ the accident took place.
A. There
B. That
C. Where
D. Which
答案：C。解析，定语从句，Spot(地点)后要求用关系副词where=on which。
25. ______to wait for hours,she brought along a book to read.
A. Expected
B. To expect
C. Expects
D. Expecting
答案：D。解析，现在分词短语作状语，表原因。不能选B，句首的不定式短语通常表示目的。
26. ______ since she was a young girl,she had wanted to become an actress.
A. Always
B. Ever
C. Long
D. Frequently
答案：B。解析，ever常与since搭配，意思是“自从…以来一直”。其余各项都不能和since搭配。
27. Arabic is a language I found ______ to learn.
A. it difficult
B. that difficult
C. difficult it
D. difficult
答案：D。
解析，difficult是定语从句中的补语，宾语是被省略了的关系代词which或that。不能选A，从句中不能再有别的宾语。
28. The fact ______ shows that he was never really serious about coming.
A. that he didn’t turn up
B. which he didn’t turn up
C. he didn’t turn up
D. for him not to turn up
答案：A。解析，fact后是同位语从句，要求用由that引出的名词从句。
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29. Let’s ______ the problem for the time being:we can return to it later.
A. settle
B. stop
C. interrupt
D. leave
答案：D。
解析，leave the problem for the time being：暂时把问题搁一搁。不能选B或C，stop和interrupt，意思是中断，打断，不能以for the time being为状语;settle是“解决”。
30. He finds it difficult to ______ himself to the climate.
A. apply
B. account
C. avail
D. accustom
答案：D。
解析，accustom himself to the climate：使自己适应气候。apply及物时为“应用”;。account及物时作“认为”;avail及物时作“有利于，有益于”。
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