_A container weighs more after air is put in, ____proves that air has weight.
| A．as | B．it | C．that | D．which |
After a long vacation, Mike came back _________.
| A．freshly and strongly | B．fresh and strong |
| C．being fresh and strong | D．to be fresh and strong |
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 |