问题描述：
-- What will Superman do _______ he is in a difficult situation?
-- He'll stand up and give his enemies a hard lesson.and that's what Dwight Howard (德怀特.霍华德),the Superman of the NBA,______.
A.if；is doing B.if ; did
为什么?答好的有额外奖励.
-- He'll stand up and give his enemies a hard lesson.and that's what Dwight Howard (德怀特.霍华德),the Superman of the NBA,______.
A.if；is doing B.if ; did
为什么?答好的有额外奖励.
问题解答：
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