---Which dress do you like best, Madam?
---- Sorry, I can’t decide __________.
| A．what to buy | B．to buy what |
| C．which to buy | D．to buy which |
Many old people take a walk after supper ____ have good health.
| A．in order not to | B．as a result |
| C．because | D．in order to |
---I think English is ____unimportant subject.
---I don’t think so. It is ____useful tool when we talk with foreigners.
| A．a; an | B．an; a | C．a; a | D．an; an |
--If you have any trouble, be sure to call me.
--______________.
| A．I will think it over |
| B．I have no trouble |
| C．I am glad to hear that |
| D．I will. Thank you |
--Didn’t you go to the football club with them that day?
-- __________. I have no interest in football at all.
| A．No, I did | B．No, I didn’t |
| C．Yes, I didn’t | D．Yes, I did |
---Shall I close the door? ---No, _____ it open, please!
| A．make | B．try | C．push | D．leave |