. I don’t smoke now, but I ____for almost ten years.
| A．ever smoked | B．have ever smoked |
| C．had ever smoked | D．was ever smoking |
“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 |