-I want to borrow the book, but I don’t know how long it may ______.-For two weeks.
Mary wants to know _____ he can go shopping with her tomorrow.
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.