17. It’s known that taking exercise______your health.
| A．do good to | B．does good to | C．is good to | D．are good for |
The moment I got back to the classroom, I found I _______ my jacket on the playground.
| A．left | B．had left | C．have left | D．was leaving |
Studying in our newly-built school is so wonderful a period _____ every one of us will treasure forever.
| A．that | B．as | C．which | D．when |
--- Can you join us for the party to be held by old friends this weekend?
--- Awfully sorry. It is one year since I _____ in China.
| A．lives | B．lived |
| C．live | D．will live |
--- What an easy examination paper , isn’t it ?
--- Quite right. How I regretted that I _____ such a silly mistake!
| A．could have made | B．would have made |
| C．should have made | D．might have made |
_____ computer games, his parents were very worried about his future.
| A．Addicted to | B．Addicting to |
| C．He addicted to | D．His addicting to |