【单选题】【消耗次数：1】
混凝土施工配制强度应( )混凝土设计强度标准值。
①
小于
②
等于
③
大于
④
B或C
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①
may
②
might
③
could
④
must
【单选题】
3. Few of them hurt themselves in the accident last night, ____ ?
①
but
②
and
③
though
④
so
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①
supporting
②
having supported
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being supported by
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being supported
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5.____the front door____, he had to enter the room through the back door.
①
Seen, painted
②
Seeing, painted
③
Being seen, being painted
④
Seeing, being painted
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①
having heard
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to hear
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hearing
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beingheard
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①
put
②
to be put
③
to put
④
putting
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①
breaking; running
②
broken; running
③
breaking; run
④
broken; run
【单选题】
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①
tried; to be left
②
had tried to; leaving
③
tried to; left
④
had tried; have left
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①
Having stolen
②
Having been stolen
③
Stolen
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Stealing