单项选择题

Only under special circumstances _____to take make-up tests.

A．are freshmen permitted
B．freshmen are permitted
C．permitted are freshmen
D．are permitted freshmen
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单项选择题
It is important that the hotel receptionist ______ that guests are registered correctly.
A．has made sure
B．made sure
C．must make sure
D．make sure
单项选择题
By the end of next year, they______ three modem hotels there.
A．will build
B．will be building
C．will have been built
D．will have built
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