—Whose book is this ?—Let me see. It ________ be Cindy’s. You can see her name on it .
— Thanks so much for helping a lot! — ______.
--- What ________ the number of the students in your school? --- About two thousand. A number of them __________ from England.
Not only the students but also the teacher __________ basketball.
Smoking is bad for your health. You’d better .
----It’s too late, I must go. ----It’s raining outside. Don’t leave ___________it stops.