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They don’t seem __________who ________for help.
A.know , to talkB.know, to talk toC.to know, to talkD.to know, to talk to
D
此题第一个空考查:seem to do 似乎做某事,第二个空考查疑问词+不定式作know宾语,句意:他们似乎不知道向谁去求助。故选D。
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