______ he will go to Germany is not decided.

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问题 ______ he will go to Germany is not decided.

选项 A、Who
B、if
C、That
D、Whether

答案D

解析 此题关键在于区分if 和whether。if 不可用来引导主语从句,主语从句中的“是否”要用whether来引导表达。此外两者还有一点区别,即引导宾语从句时whether可以直接接or not,而if不可以。例如:Ask whether or not he plans to come to the meeting。(问问他是否来参加会议。)故选D。
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