单项选择题

Collecting stamps as a hobby______increasingly popular during the past ten years.
A.became
B.becomes
C.has become
D.have become

A.A.became
B.becomes
C.has
B.have
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单项选择题
Why he entered the house and how he managed to get out of it without being seen by people______a mystery to us all.A.remainB.remainsC.has remainedD.are remaining
A.A.remain
B.remains
C.has
B.are
单项选择题
—You hate Jim, dont you? —______, I just think hes a bit annoying. Thats all.A.Not exactlyB.That's itC.AbsolutelyD.No way
A.A.Not
B.That's
C.Absolutely
D.No
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