The smog arrived in the Yangtze River Delta region on Nov．30，_________the air quality in 1 2 cities out of 25 was rated as severely polluted by Dec．1．
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A
where
B
when
C
which
D
what
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There are various things on sale, so you can choose____ interests you.
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A
whoever
B
no matter who
C
whatever
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He got the first place in the Oral English Contest, ____ was beyond his expectation.
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A
that
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it
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what
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which
Lauren Berger started out as a clueless college freshman at the University of Central Florida，________ only work experience was serving at a seafood restaurant.
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which
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when
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whose
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He forgot to lock the door, _______of course, made things even worse.
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who
B
whom
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which
D
what