— What great trouble I have solving this problem now！
—_____ my advice, you ________less trouble.
| A．If you had taken, would have had | B．If you took, would have |
| C．If you had taken, would have | D．If you take, will have |
To everyone’s surprise, Tom claimed _______ all his work two days ago.
| A．to finish | B．to have finished |
| C．finishing | D．having finished |
We were really worried about you, you________ home without saying a word.
| A．shouldn’t have left | B．shouldn’t leave |
| C．mustn’t have left | D．couldn’t leave |
Eight dollars for just a cup of coffee? I’m afraid you got________.
| A．held up | B．ripped off |
| C．cut off | D．stuck in |
The teacher made a request that all the homework_______ before class.
| A．should hand in | B．must be handed in |
| C．be handed in | D．were handed in |
The key______ the problem of traffic jams is to pay the “ congestion charge” ______ by the mayor of London.
| A．to solving; introducing |
| B．to solve; introducing |
| C．to solving; introduced |
| D．to solve; introduced |