---I regret _____you John has been fired．
---I can hardly believe my ears．He’s such a fine worker．
| A．telling | B．having told | C．to tell | D．to have told |
This sweater fits me, but I can’t afford to buy __________. I have to choose _________ which is cheap enough for me.
| A．it; that | B．that; it | C．it; one | D．that; the one |
He suggested the problem worth paying attention ______ at the meeting.
| A．to be discussed | B．to being discussed | C．to discuss | D．to discussing |
I fixed my eyes upon the newcomer, wondering whether I ________ him somewhere before．
| A．saw | B．has seen | C．had seen | D．would see |
一I’m sorry! I would have taken him to hospital if I had known he was seriously ill.
一But ______ .
| A．you didn’t | B．you hadn’t | C．he wasn’t | D．you aren’t |
The question that puzzled them is ____ they can get rid of the air pollution in the area.
| A．how is it that | B．that how | C．that it is how | D．how it is that |