We haven't settled the problem of it is necessary for him to study abroad.A. whyB. whethe

发布时间：2020-08-17 10:03:20

We haven't settled the problem of      it is necessary for him to study abroad.
A. why
B. whether
C. what
D. how

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A. why
(答案→)B. whether
C. what
D. how
解析：B 考察宾语从句。此处的whether是否，引导一个宾语从句作为介词of的宾语。
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