单项选择题

It was essential that the application forms（）back hefore the deadline.

A、 must be sent
B、 would he sere
C、 be sent
D、 were sent

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单项选择题
By the end of this month, we surely（）a satisfactory solution to the problem.

A、 have found
B、 will be finding
C、 are finding
D、 will have found
单项选择题
She told her children that they must not,（）, play with matches.

A、 on any account
B、 to good account
C、 in no sense
D、 by no means
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