----I think collecting stamps is great fun.----________We can also learn a lot from it .A. I agree with you. B. No, I don't think so. C. No, I don't like it.
---Look, the old man who is playing ________ guitar is ______ university teacher. ---Oh, how nice the music is!
Helen’s never late for school , _____ she ?
Half of the class _____ done most of the work .The left _____ rather difficult.
– Why did you _____ up these flowers ? – Because I want to grow some vegetables there .
–Can’t you see the sign ? It ________ “No smoking !” –Oh , Sorry I didn’t see it .