問題詳情

7. Dozens of scientific groups all over the world have been _______ the goal of a practical and economic way to use sunlight to split water molecules.
(A) pursuing
(B) chasing
(C) reaching
(D) winning

參考答案

答案：99

統計：A:0,B:0,C:0,D:0,E:0

難度：計算中