题目

_______was not ______she took off her dark glasses _______I recognized her. A. It; when; before           B. It; until; that C. That; after; that           D. This; when; after 答案：B 解析: 略下列情况不会造成大气污染的是A.动物的呼吸B.燃烧煤产生的烟C.燃放烟花产生的气体D.汽车排气形成的烟雾