According to the statistics, listening to loud music at rock concerts ______ hearing loss in some teenagers in the past 2 decades.
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A
have caused
B
caused
C
had caused
D
has caused
推荐题目
I think ______ of the materials I listened to at the beginning of the exam ______ easy.
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A
three fourths, is
B
third four, are
C
three fourths, are
D
three fourth, are
I wonder whether the teacher is one of those who _______ to the mountain village to help the children there.
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A
have sent
B
has sent
C
has been sent
D
have been sent
— Why does the lake smell terrible?— Because large quantities of water ____.
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A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
Nobody in our class but Tom and I ___ that our monitor is going abroad for further education.
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A
know
B
am to know
C
have known
D
knows