单项选择题

（）we can't get the necessary equipment, what shall we do

A．Since
B．Supposing
C．As long as
D．In case

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This is one of those cars that（）in the accident.

A．is damaged
B．was damaged
C．are damaged
D．were damaged
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Medical research has shown that the widespread of use of cigarettes contributes（）the increase of cancers.

A．to wards
B．for
C．with
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