单项选择题

-- The light in the office is still on.
-- Oh, I forgot（）

A．turning it off
B．turn it off
C．to turn it off
D．having turned it off

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单项选择题
So carelessly （）that he almost killed himself.

A．he drives
B．he drove
C．does he drive
D．did he drive
单项选择题
It is impolite of a child （） while adults are talking.

A．to cut in
B．to break down
C．to get across
D．to turn to
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