— The teacher asked us ________________A. What the bad effect of pollution are.B. What were the bad effect of pollution.C. What the bad effect of pollution were.
—What’s wrong with you? —_________________.
He used to ________very late, but now he is used to __________early.
Could you_________ when the planes arrives?
—I’m sorry I_______ my exercise book at home. —Don’t forget _______it here tomorrow , please.
At last, she found her _______ pet dog.