—Must I finish my homework at school?— No, you_____. you can do it at home
The man tells us that the best time _____ Beijing is in autumn.
____tall trees they are!
The old man _____ under a big tree is holding a _____ pole in his hand.
---How do you learn English words ? ---______ making flashcards.
Do you know the man _____ is sitting behind Nancy ?