单项选择题

He never let me ______ when I need his support.

A．in
B．down
C．off
D．out
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单项选择题
______ he will come or not is unknown.
A．If
B．Whether
C．That
D．What
单项选择题
Not a single word ______ all morning.
A．did he say
B．he said
C．said he
D．does he say
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