2. 外语
  3. We are all disappointed that many a bright idea________put into action so far.

We are all disappointed that many a bright idea________put into action so far.

admin2022-09-19  12
问题 We are all disappointed that many a bright idea________put into action so far.
选项 A、isn’t
B、aren’t
C、haven’t been
D、hasn’t been
答案D
解析 本题考查谓语动词的时态和主谓一致。“many a+单数名词”作主语时，谓语动词用单数形式，且由so far可知，此处用现在完成时，故答案为D)。
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