I don't know if it ____ (rain) tomorrow. If it ______ (rain) tomorrow, I won’t climb the hills.
We often borrow some books from the______.
Sun Yang is good at______, we all like him.
The two twins are too young, we should help______.
— I like eating vegetables. What about you? — ______. They are nice.
— ______do you go to work every day, Mr. Ling? — By bus.