- Has your father stopped smoking?
- Not yet. It's quite hard for him to
| A．break off it | B．give up it |
| C．break it off | D．give it up . |
【2012江苏泰州】Cross the road carefully, ____you’ll keep yourself safe.
| A．so | B．or | C．but | D．and |
【2012 贵州遵义】—How was your climbing Mount. Huang?
—I didn’t believe I could do it _______ I got to the top.
A. until while C. after
【2012 贵州遵义】Help others whenever you can_______ you’ll make the world a nicer place to live in.
A. or B. and C. but
【2013山东临沂】Please hold on to your dream one day it comes true.
| A．if | B．until | C．unless | D．though |
【2013江苏连云港】 I won't watch basketball matches ________ James is playing. He pays much attention to teamwork.
| A．unless | B．if | C．although | D．Since |