------ Tom looks very happy. He_______ have passed the exam
------ I think so. It’s too easy after all.
| A．could | B．should | C．might | D．must |
He said that the key _____ to open the door had been lost.
| A．with what | B．with it | C．with that | D．with which |
I think you’ve got to the pointa change is needed, otherwise you will fail.
| A．when | B．that | C．where | D．which |
The small mountain villagewe spent our holiday two years ago lies in Hubei.
| A．what | B．where | C．that | D．which |
They went on well at first but eventually everything ______ they had worried about happened．
| A．which | B．what | C．that | D．when |
The police got to _________ was once an old yard_________ the workers used as a store.
| A．what; where | B．which; where | C．that; that | D．what; which |