• 2021-04-14
    A great effort must still be made _______ the ideas can be turned into really.
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      The great wall symbolizes that great achievement can be made with a ___________ and ____________ .

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      It is cold in the room. They ________ the heating. A: must have turned off B: must turn off C: can’t have turned off D: may turn off

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      中国大学MOOC: The great wall symbolizes that great achievement can be made with a a common will and __________ .

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      It is cold in the room. They ____ have turned off the heating. A: must B: can C: mustn’t D: can’t

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      ---That was a great dinner. You must have spent all day cooking. --- ____ . But it really took only an hour.