【单选题】【消耗次数:1】
14. I didn’thear the phone. I ______ asleep.
must be
must have been
should be
should have been
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①  must be
②  must have been
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①  on
②  for
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【单选题】 I have been looking forward to ____ from my parents.
①  :hear
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③  whose
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【单选题】 下列组织学类型的肺癌最常见的是( )
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