2013
高考英语：二轮单项选择、填空专练（1）（答案或解析） 21．—i’m sorry , but there’s no smoking on this flight . —oh, i that . sorry , i won’t again . a．don’t know b．didn’t know c．won’t know d．haven’t known 22．it is no longer a question man is learning more and more about space . a．whether b．that c．if d．how
