問題詳情
4. A: Why are green buildings so important? B: _______
(A) They are famous for their green designs.
(B) Because they save the Earth’s natural resources.
(C) Because of the eco-friendly blackboards.
(D) All the cars will run on biogas by 2020.
參考答案
答案：B
難度：計算中-1
書單：沒有書單，新增
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