27. We haven’t settled the question of it is necessary for him to study abroad.A. ifB. wh

发布时间：2020-08-16 06:56:45


27. We haven’t settled the question of      it is necessary for him to study abroad.
A. if
B. where
C. whether
D. That

网友回答

A. if
(答案→)B. where
C. whether
D. That
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