問題詳情
【題組】47 According to the passage, where in the world is the problem of clean water supply most serious?
(A) The developed world
(B) The underdeveloped world
(C) The natural world
(D) The developing world
參考答案
答案：D
難度：適中0.527778
統計：A(9),B(6),C(2),D(19),E(0)