单项选择题

This will improve their working conditions and enable them to double the______.

A．goods
B．quantity
C．output
D．product
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单项选择题
Jack lost his job a year ago and he ______another job yet.
A．has found
B．hasn't found
C．found
D．founded
单项选择题
There______ no time left, we had to change our plan.
A．being
B．had
C．would be
D．has
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