He _______ have taken your car by mistake because he didn’t have the keys.
| A．mustn’t | B．shouldn’t | C．couldn’t | D．needn’t |
---What a pity! I missed the last concert of the year.
---Oh, not at all. It was so terrible. In fact, I would rather I ________ there.
| A．hadn't been | B．was not | C．haven't been | D．am not |
With he help of his friends, he has _________ a good business over the years.
| A．build up | B．made up | C．cut up | D．grown up |
"We can't go out to play football in this rainy weather," said Bob, ________ out of the window disappointed.
| A．look | B．to look | C．looked | D．looking |
The twins were so much alike; I could hardly ________ Tom.
| A．pick up | B．pick out | C．pick off | D．pick at |
By far, there are many problems ________ to be solved.
| A．remaining | B．remained | C．being remained | D．to remain |