单项选择题

After （）the numbers' in every possible combination, we finally hit on a solution.

A．running through
B．running after
C．running over
D．running out

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单项选择题
It is very important for the staff to dress in something （）to the job.

A．proper
B．approximate
C．appropriate
D．relevant
单项选择题
There are many theories that （）to be able to predict whether you will give birth to a girl a boy.

A．declare
B．claim
C．announce
D．state
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