单项选择题

The snow was now two feet deep, making it difficult, _____, to get the car out.

A．if necessary
B．if at all
C．if not impossible
D．if ever
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单项选择题
Not finding the key, the firemen had to _____ the door to get into the burning house.
A．break off
B．break out
C．break down
D．break up
单项选择题
If I were you, I wouldn’t believe all those stories – Big Sam loves _____ things up.
A．making
B．turning
C．mixing
D．keeping
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