She didn’ t know______to express her ideas in English clearly in public.

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问题 She didn’ t know______to express her ideas in English clearly in public.

选项 A、which
B、why
C、how
D、what

答案C

解析 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。(1)作主语:When to start has not been decided.(何时动身尚未决定。)(2)作宾语:I don’t know what to do.(我不知道该怎么办。)(3)作表语:The difficulty was how to crossthe river.(困难在于如何过河。)(4)作双宾语:I can tell you where to get this cake(我可以告诉你哪儿可以买到这种蛋糕。)本题考查该结构作宾语的情况。
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