They have done things they ought( ).A、not to doB、not to be doneC、not to have d

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问题 They have done things they ought( ).

选项 A、not to do
B、not to be done
C、not to have done
D、not having done

答案 C

解析本题考查动词时态用法。ought not to have done表示不应该做的却做了。

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