单项选择题

There ______ more than one cause contributing to the accident.

A．were
B．was
C．be
D．have been
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单项选择题
Some animals can ______ in the desert on very little water.
A．survive
B．starve
C．relieve
D．routine
单项选择题
Leave me alone; mind your own ______.
A．events
B．affairs
C．things
D．matters
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