問題詳情

36. One day, polar bears may be all gone. We should _____ beforeit’s too late.
(A) use them to make money
(B) draw everyone to see them
(C) do our best to protect them
(D) show their information on the websites

參考答案

答案:C
難度:非常簡單1
書單:沒有書單,新增

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