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科目： 來源：不詳 題型：單選題

To be on the safe side, we should fill up the tank now, because we ______ run out of gas on the way.
A．couldB．mightC．wouldD．must

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科目： 來源：不詳 題型：單選題

It’s unbelievable that such a small girl ____ have so much knowledge about computer.
A．couldB．wouldC．shouldD．might

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科目： 來源：不詳 題型：單選題

It was playing computer games that cost the boy plenty of time he ____ doing his lessons.
A．might have spentB．ought to have spentC．must have spentD．could have spent

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科目： 來源：不詳 題型：單選題


John promised his doctor he ________ not smoke, and he has smoked ever since.
A．mightB．shouldC．couldD．Would.

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科目： 來源：不詳 題型：單選題

Thank you for all your hard work last week. I don’t think we _____ it without you.
A．can manageB．could have managed
C．could manageD．can have managed

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科目： 來源：不詳 題型：單選題


It is usually warm in my hometown in March, but it _____ be rather cold sometimes.
A．mustB．canC．shouldD．would

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科目： 來源：不詳 題型：單選題

You don’t have to know the name of the author to find a book. You ____find the book by the title.
A．mustB．needC．canD．would

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科目： 來源：不詳 題型：單選題

According to the air traffic rules, you______switch off your mobile phone before bearding.
A．may B．canC．would D．should

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科目： 來源：不詳 題型：單選題

_____ U2, the Irish rock band from Dublin perform a concert in Beijing, tell me in advance.
A．IfB．ShallC．ShouldD．Would

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科目： 來源：不詳 題型：單選題

--- Guess what! I have got A for my term paper.
--- Great! You ______ read widely and put a lot of work into it.
A．mustB．shouldC．must haveD．should have

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