She didn′ t know __________ to express her ideas in English clearly in public.

2023-08-07

A.which
B.why
C.how
D.what


参考答案:C

考查疑问词与不定式结构。疑问词who,what,which,when,where和how后加不定式可构成一种特殊的不定式短语。它在句中可以用作主语、宾语、表语和双宾语等。本题是该结构作宾语的情况。故选C。

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