问题
选择题
The question will also calm the person ,______him or her know that help is on the way .
A．to let
B．lets
C．letting
D．to have let
答案
答案：C
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The question will also calm the person ,______him or her know that help is on the way .
A．to let
B．lets
C．letting
D．to have let
答案：C