21. Changjiang River is ＿＿＿ river in China.
A. long B. longer
C. longest D. the longest
［答案］ D.
22. I'll work ＿＿＿ I can.
A. so hardly as B. so hard as
C. as hardly as D. as hard as
［答案］ D.
［析］ hard可用作形容词和副词，如：The desk was made of hard wood 又如：It is raining hard。 而 hardly 是副词，其词义是"几乎不"，如：Hardly did I sleep last night. 我昨晚几乎没有睡觉。而且hardly用于句首时要采用倒装语序。as…as即可以用于肯定句，也可以用于否定句，但so…as则只能用于否定句中。
23. It is very ＿＿＿ to listen to him.
A. interested B. interesting
C. interested in D. interest
［答案］ B.
［析］ interest作为名词有两个词义，①兴趣，②银行中所讲的利息。而其形容词 interesting是"使人感兴趣的"，而interested是"感兴趣的"如：He is interested in English.
24. Things are ＿＿＿ worse than I thought.
A. more B. few
C. very D. much
［答案］ D.
［析］ 只有much可以修饰比较级。
25. It is one o'clock, but her father hasn't come back ＿＿＿ .
A. already B. still
C. too D. yet
［答案］ D.
［析］ 完成时的否定句尾要用yet， 而already则用于肯定句。
26. Comrade Chen is ＿＿＿ older than I.
A. very B. more
C. much D. quite
［答案］ C.
［析］ 只有much可以修饰比较级。可以修饰比较级的词还有much, far, even a little, by far等。
27. She did her homework ＿＿＿ .
A. carefully B. careful
C. care D. careless
［答案］ A.
［析］ 这里应填入副词，而careless是由care加less后辍得来的，less意为"没有"，是否定之意，如：careless-不小心，homeless-无家可归。而carefully为副词。
28. They can't answer the question in Japanese; we can't answer it, ＿＿＿ .A. also B. too
C. either D. neither
［答案］ C.
29. - How are your parents?
- They are very ＿＿＿ , thank you.
A. good B. kind
C. well D. happy
［答案］ C.
［析］ 由问句得知其询问的是身体如何，所以well作为身体状况不错时应视为形容词。
30. Peter runs ＿＿＿ in our class.
A. the fast B. faster
C. fastest D. most fast
［答案］ C.
［析］ 副词的最高级前可以加定冠词，也可以不加定冠词。
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