Jackie Chan has donateddollars to charity.—He is an example to us all.

______ did you sleep last night?—Only five hours. I stayed up late to do my homework. [ ]

The teachers believe ______ punishment is by no means ______ wise choice to help the pupils grow healthily.

____________you swim? —Yes，but I’m not a good swimmer.

How clean the room is! —Yes，I am sure that someone _______ it.