Try to spend your time just on the things you find _________.
| A．worth doing them | B．worth being done |
| C．them worth doing | D．worth doing |
Though he started late,Mr.Guo played the piano as well as,if______,Miss Liu.
| A．not better than | B．not better |
| C．no better than | D．no better |
—Could I use your computer for a few moments,please?
—_______.I’m not using it myself.
| A．Come on | B．It depends |
| C．Go ahead | D．That’s great |
—Ouch!You hurt me!
—I am sorry.But I___any harm.I___to drive a rat out.
| A．didn’t mean;tried |
| B．don’t mean;am trying |
| C．haven’t meant;tried |
| D．didn’t mean;was trying |
I don’t mind her criticizing me,but___is how she does it that I object to.
| A．it | B．that |
| C．this | D．which |
Experts have been warning___of the health risks caused by passive smoking.
| A．at a time | B．at one time |
| C．for some time | D．for the time |