While watching television, ____.
| A．the doorbell rang | B．we heard the doorbell ring |
| C．there was someone knocking at the door | D．the doorbell was ringing |
“I am thinking of tomorrow’s maths test. I’m afraid I can’t pass it.” “_____. I’m sure you’ll make it.
| A．No problem | B．Good luck | C．Give up | D．Cheer up |
._____ you don’t like him is none of my business.
| A．What | B．Who | C．That | D．Whether |
______of danger in the street at night, she had to go home, with a friend_____ her.
| A．Warned; followed | B．Warning; following |
| C．Having warned; followed | D．Having been warned; following |
Earth is a rocky planet_____ liquid water, which is necessary for life, can exist.
| A．as | B．which | C．where | D．when |
.Having retired from business, he now_____ himself with the welfare of disabled and lives a meaningful life.
| A．associates | B．occupies | C．charges | D．rewards |