单项选择题

The reason for his absence is ______ he fell ill yesterday.

A．why
B．that
C．because
D．for
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单项选择题
Don't touch the cat, he may ______ you.
A．scream
B．scratch
C．stretch
D．sting
单项选择题
Look ______ ! There's a car coming.
A．up
B．out
C．back
D．over
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