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If you ________ at school, you _______ a college student now.
A．had studied hard; would have beenB．should have studied hard; should have beenC．had studied hard; would beD．would study hard; must have been
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Although this         sound like a simple task, great care is needed.
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科目：高中英語 來源：不詳 題型：單選題


. Mary _____ be in London because I saw her in town just now.
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科目：高中英語 來源：不詳 題型：單選題


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