摘要
1、单项选择1. They worked day and night but got nothing. Such the blackslaves.A. is B. are C. was D. were2. By the time I leave the city, I here for three months.A. had been B. will have been C. would be D. was3.-It be Li Ming who has taken my dictionary away.-No, it be him. He has his own.A.mustn't;must B.can't; must C.mustn't;mustn't D.must;
