問題詳情
【題組】75. Why does the author write that indoor pollution should be carefully considered?
(A) because smoking is harmful to one’s health
(B) we spend 80-90 percent of our time indoors
(C) most people are aware of indoor pollution
(D) indoor pollution is more harmful than outdoor pollution
參考答案
答案：B
難度：簡單0.846154
統計：A(1),B(11),C(0),D(0),E(0)