问题补充:
No one told us ,so we need your help.
A. how should we do
B. what should we do
C. what to do it
D. how to do it
答案:
A. how should we do
B. what should we do
C. what to do it
(答案→)D. how to do it
解析:句意:没有人告诉我们该怎样做这件事,因此我们需要你的帮助。A选项是由how 引导的宾语从句,从句中应该用陈述语序,这里却是疑问语序,故A不对;同样可排除B;C选项是疑问词what 后跟动词不定式的形式,what 是连接代词,应该做do 的宾语,故it 多余;how 后跟不定式,表示怎样做。
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