单项选择题

Nobody but doctors or nurses and those ______ by Dr. Hu ______ to enter the patient's room.

A．invited; is allowed
B．are invited; are allowed
C．being invited; allowed
D．invited; are allowed
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单项选择题
They soon realized that, ______ , the situation would get worse.
A．unless dealing with carefully
B．if not carefully dealing with
C．unless carefully dealt with
D．if dealt not carefully with
单项选择题
To get a high score ______.
A．working hard is needed
B．one must work hard
C．working hard is very important
D．requirement is what is needed
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