【題目】My mother doesn't know __________ this morning.
A.what to do
B.what does do
C.how to do
D.how does do

【答案】A
【解析】句意“我的媽媽今天早晨不知道要做什么”。本題考查“疑問詞+to do”的形式。且若用how,則需要使用“how+to+do+賓語”的形式。故選A。

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