题目

That car nearly hit me; I ______.     A. might be killed        B. might have been killed     C. may be killed          D. may been killed 答案：B香烟燃烧产生的烟雾中，含有的有害的致癌物质主要是A.二氧化碳 B.尼古丁 C.氮气 D.氧气