单项选择题

______is known to all, too much smoking will cause lung cancer.

A．That
B．It
C．As
D．What
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单项选择题
Since you won't take advice, there is no ______in asking for it.
A．place
B．point
C．reason
D．way
单项选择题
In winter, animals have a hard time ______anything to eat.
A．to find
B．to finding
C．to find out
D．finding
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