The professor paused as if ___________ his students to ask questions on the point he had just made.
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A
expecting
B
is expecting
C
expected
D
to have expected
推荐题目
While watching television, ____.
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A
the doorbell rang
B
we heard the doorbell ring
C
there was someone knocking at the door
D
the doorbell was ringing
____in faraway northwest , this place has its beautiful fresh air .
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A
Being located
B
Located
C
locating
D
To be located
The audience were ______ by his _______ performance on the stage. 
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A
amazed; amazed
B
amazed; amazing
C
amazing; amazed
D
amazing; amazing
Because of the young man’s       English, he couldn’t make himself _______.
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A
broken; understood
B
broken; understand
C
break; understand
D
breaking; understanding