22.People were not allowed to enter the reading room because it .
A.had been painted B.was being painted
C.was painting D.painted
第一节 语法和词汇知识 (共15小题;每小题1分,满分15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
例: It is generally considered unwise to give a child he or she wants.
A.however B.whatever C.whichever D.whenever
答案是B。
21.If we expect much cleaner world, we should attract world's attention to protect it.
A.a; a B.a; 不填 C.a; the D.the; 不填
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