Some people believe _______ green can give us energy.—I agree. But I wasn’t certain ________ I was suitable for wearing green in the past.

_____ do you go to the school library?—Once a week.A．How often

What does the model plane look like? — Well, the wings of the plane are _____ of its body [ ]

I was tired _____ listening to classic musicLet’s listen to the pop songs

Tom isn’t a boy.He is an boy.