Have you been to the Great Wall?－Perhaps not in my memory. _______ , it might have been during my early childhood.
Tom is expecting a pet for long, but his daddy has no time to buy _________ for him.
I can’t find ________ beef in the fridge. Shall I buy some?
The children won’t go out flying kites if it __________ tomorrow.[ ]
I __________ this book for two weeks. I have to return it now.