题目内容：

Your sister is often heard____(sing) English songs in the afternoon.
One of the cleaners _____(remove) the snow from 5 to 7 yesterday morning.
The boy is very happy because all the newspapers____(sell)out already.
There _____(be)two football matches in your school tomorrow ,are there?
How many magazines can ___(borrow) in your library every week?
John_____(hear)to go upstairs two hours ago.
Who ____(save) her father?He ____(save)by that policeman.
Mooncakes ____(make)by his mother every year.
The boy ____(make)____(stay)at home.
The computers in that shop _____(sell)well.
They should ____(help) when they are sick.