should not be allowed to go out at night.
A. Twelve-years-old B. Twelve-year-olds
C. Twelve year old C. Twelve year old
—Does your father still smoke?
—No, he has succeeded in_____ smoking for three years.
| A．giving up | B．give up |
| C．gives up | D．gave up |
I think that you have made rapid _____ in math.
| A．a progress | B．progress |
| C．progresses | D．progressed |
I find _______necessary to do everything we can ____________protect the environment.
| A．it; do | B．this is; do to |
| C．it; to | D．it; in order that |
Sam didn't go to school yesterday , did he? ____ .He was ill yesterday.
A. Yes, he did
B. Yes, he didn’t
C. No, he didn’t
_____ important news it is to have a sports meeting next week!
A. What B. What an C. How