He ________ your car by mistake because he didn't have the keys.
| A．mustn't have taken | B．shouldn't have taken |
| C．couldn't have taken | D．needn't have taken |
Her fairy tales didn’t kids probably because she employed too many scientific terms．
| A．refer to | B．apply for | C．appeal to | D．intend for |
—How did he get my telephone number?
—You ________ it . You told him last week．
| A．should have forgotten | B．may have forgotten |
| C．must have forgotten | D．could have forgotten |
When I got back home, I saw a message pinned to the door“ Sorry to miss you, I will call later.”
| A．read | B．reads | C．to read | D．reading |
Present at the meeting ．
| A．Mr. Liu was, who taught us English |
| B．was Mr. Liu, who taught us English |
| C．was who taught us English, Mr. Liu |
| D．Mr. Liu, who taught us English, was |
Scientists are convinced _____ the positive effect of laughter _____ physical and mental health．
| A．of; on | B．by; in | C．of; at | D．on; at |