单项选择题

So many directors______, the board meeting had to be put off.

A．were absent
B．been absent
C．had been absent
D．being absent
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单项选择题
As a result of careless washing the jacket______ to a child's size.
A．compressed
B．shrank
C．dropped
D．decreased
单项选择题
The relationship between employers and employees has been studied______.
A．originally
B．extremely
C．violently
D．intensively
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