My brother doesn't do homework after supper.
They should have helped him.
How often does your father watch TV in the evening?
Let us go to the zoo,shall we?
The bicycle cost him 500 yuan.
The aricle needs to be shortened.
When heated,the water changes into steam.
Do you know how the accident took place?
They had a lot of fun in the park yesterday.
All the books in the bag belong to us.