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30. We are confident that the environment ______by our further efforts to reduce pollution.   
(A)had been improved
(B)will be improved   
(C) is improved
(D) was improved


答案:B
難度: 計算中
最佳解!
jay 國二上 (2020/02/09)
看到“by” 既想到被動be Vpp. ★★...


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30. We are confident that the environmen..-阿摩線上測驗