题目

近年来，受雾霾天气影响，我国多市频现重污染天气，中小学临时停课。下列做法对减轻雾霾有效的是（ ）①节约用水 ②大量燃放烟花爆竹 ③绿色出行 ④尽量少吃路边烧烤 A . ①② B . ②③ C . ③④ D . ①④ 答案：C"______ did you come here?" "Li Ping drove me." A.HowB.When C.Why D.How often