2. 外语
  3. They have done things they ought( ).

They have done things they ought( ).

admin2016-03-11  25
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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