---Thank you for helping me a lot.
---_________________. That’s what friends are for.
| A．With pleasure | B．It doesn’t matter |
| C．It’s kind of you | D．Don’t mention it |
The rivers in Changshun are clearer than _____ in Wuhan..
| A．that | B．it | C．one | D．those |
—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