问题
选择题
They don’t seem __________who ________for help.
A．know , to talk
B．know, to talk to
C．to know, to talk
D．to know, to talk to
答案
答案：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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