2016-2017学年 外研版 必修1 Module2 My new teachers Grammar 课件 (7)
2016-2017学年 外研版 必修1 Module2 My new teachers  Grammar 课件 (7)第5页

1. In some parts of London, missing a bus means________ for another hour. A. waiting B. to wait C. wait D. to be waiting

Exercise

2. He is so busy that he can’t help _____ the classroom. A. cleaning B. to cleaning C. to clean D. cleaned