He made up his mind to devote his life _____ pollution ______happily．
| A．to prevent; to live | B．to prevent; from living |
| C．to preventing; to live | D．to preventing; from living |
One should have a _______ of right and wrong.
| A．feeling | B．knowledge | C．sense | D．idea |
I like getting up very early in summer. The morning air is so good.
| A． | to be breathed | B． | to breathe |
| C． | breathing | D． | being breathed |
-What fruit is in season now?
-Grapes and peaches,（）.
| A． | I know | B． | I think | C． | I see | D． | I feel |
-Sorry, I made a mistake again.
-Practice more and you'll succeed.
| A． | Never mind | B． | Certainly not |
| C． | Not at all | D． | Don't mention it |
After studying in a medical college for five years, Janeher job as a doctor in the countryside.
| A．set out | B．took over | C．took up | D．set up |