单项选择题

I don't remember______the lights before I left. But the lights are out.

A．turn off
B．turned off
C．to turn off
D．turning off
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单项选择题
I'd like to______some sample products before I decide to buy them.
A．send away for
B．send out
C．send off
D．send to
单项选择题
Warm-hearted______he is, he can't help all the people out.
A．like
B．as
C．for
D．of
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