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【单选题】
Cars do cause us some health problems——in fact far more serious ______ than mobile phones do.
A.
one
B.
ones
C.
it
D.
those
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
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A.
operation
B.
maintenance
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service
D.
advice
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A.
what
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which
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that
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this
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A.
where
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from which
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from where
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which
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A.
suggested
B.
demanded
C.
recommended
D.
hoped
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A.
that
B.
something
C.
what
D.
anything
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A.
Taking
B.
To take
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Take
D.
Taken
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A.
It’s a new radio
B.
It’s his birthday
C.
It’s very expensive
D.
It’s too late
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A.
to have been discovered
B.
to discover
C.
to have discovered
D.
having been discovered
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A.
while
B.
before
C.
as
D.
when