问题描述：
Did the doctors save the old man?
——Yes.He ___on the morning of May 10th.And now he is out of danger.
A.was operated B.operated C.operated on D.was operated on
_______【为什么选这个?
——Yes.He ___on the morning of May 10th.And now he is out of danger.
A.was operated B.operated C.operated on D.was operated on
_______【为什么选这个?
问题解答：
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