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【单选题】
听力原文：W: Would you mind if I visit your class this evening, Professor Johnson? M: I have no objection to your visit. But the students will take their examination tonight. Perhaps you can come back next Monday. What does the professor tell the woman?A.
Not to visit his class.
B.
The class objects her visit.
C.
To visit his class next Monday.
D.
The students will have their examination next Monday.
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【单选题】Generally speaking, there are two destructive tsunamis every year around the world.
A.
Y
B.
N
C.
NG
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A.
the number of
B.
a number of
C.
all the number of