单项选择题

They are working () time to fulfill the task according to the schedule.

A. against
B. over
C. ahead of
D. before

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单项选择题
After the music had () there was a storm of applause.

A. died out
B. died hard
C. died off
D. died away
单项选择题
The book contained a large () of information.

A. deal
B. amount
C. number
D. sum
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