单项选择题

There have been quite a number of road ______today because of yesterday's snowstorm.

A．incidents
B．accidents
C．accident
D．incident
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单项选择题
He is' only a boy of three, but he can learn the poem ______heart.
A．by
B．at
C．in
D．to
单项选择题
I found him ______on the ground.
A．lie
B．lying
C．lay
D．to lie
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