This TV program discusses where the best tea leaves ________.( )
A.were producedB.have produced
C.produced
—Another cup of coffee?—No, thanks. I ________ be off. My friend is waiting for me at the school gate.
Must I finish my homework first? No, you ________.
The girl is so excellent that you ________ praise her too much.
—Listen! Someone is knocking at the door. Who _____it be?—It_____ be Tom. He phoned to visit me this evening.
---May I do the rest of the work tomorrow? ---Yes, of course. You finish it today.