Only after______requests by the tenants did the superintendant do something about the broken intercoms in some of the apartments

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问题 Only after______requests by the tenants did the superintendant do something about the broken intercoms in some of the apartments.

选项 A、repeat
B、repeated
C、repeating
D、repetition

答案B

解析 横线处所填单词修饰名词requests。过去分词(B)repeated和现在分词(C)repeating都可用作形容词。被修饰的名词和分词之间如果是被动关系,就用过去分词;如果是主动关系,则用现在分词。requests和repeat是被动关系,故选择过去分词(B)repeated。
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