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Manmustkeepinmindthatitwillbeyears

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問題詳情:

Manmustkeepinmindthatitwillbeyears

Man must keep in mind that it will be years ______ the earth recovers from the damage he makes to it.         

A. when                        B. before                   C. since                D. until

【回答】

B

知識點:連詞

題型:選擇題

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