题目内容

-Are they mending their cars?

-________.


  1. A.
    Yes, they aren't
  2. B.
    No, they are not
  3. C.
    Yes, they are
  4. D.
    No, they are
C
现在进行时回答要用简略式,即Yes, they are.或No, they aren't.答案是肯定的用Yes, they are.否定的用No, they aren't.不能用Yes, they aren't.或No, they are.的形式。
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