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I'mafraidwe'llhavetoworkextrahours,forsomeproblemsareha...

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問題詳情:

I'mafraidwe'llhavetoworkextrahours,forsomeproblemsareha...

I'm afraid we'll have to work extra hours, for some problems are hard ________.

A.to settle    B.settled   C.to be settled     D.settle

【回答】

A

知識點:非謂語動詞

題型:選擇題

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