—It seems Mr. Smith is standing over there.

—It ________be him because he has just called me from Canada.

A. can’t B. mustn’t C. must D. needn’t

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對健康不利，影響學(xué)習(xí)……

你的建議

……

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2．文中不得出現(xiàn)自己的真實(shí)姓名和學(xué)校名稱；

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