What’s wrong with you, Jack? You look tired.—I ________ to prepare for the final exam last night.

Don’t play a trick ________ him. [ ]

Time is money.—But I think time is _________ money.

Tom, you should be polite and let our grandpa get the car first.— OK. And I will open the door for him.

The Modern Art Exhibition in the City Museum has been cancelled.–Oh, no! .