单项选择题

The fire must have______after the staff had gone home.

A．broken down
B．broken up
C．broken out
D．broken off
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单项选择题
Thenastylanguage of local officials makes them seem very ignorant and rude.
A．artificial
B．indecent
C．humorous
D．lively
单项选择题
It is anticipated that this contract willsubstantiallyincrease sales over the next three years.
A．apparently
B．slightly
C．considerably
D．steadily
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