During the period of recent terrorist activities, people _____ not to touch and unattended bag.
| A．had always been warned | B．were always being warned |
| C．are always warning | D．always warned |
Why didn't you tell me there was no meeting today? I _____ all the way here _____the heavy snow.
| A．needn't have driven；through | B．can't have driven；across |
| C．mustn't have driven；through | D．shouldn't have driven；cross |
Never _______ forget the days when _______ together with you．
| A．shall I；I lived | B．shall I；did I live |
| C．I shall；I lived | D．I shall；did I live |
I coutdn't have got to the meeting on time____________ an earlier train.
| A．if I had not caught | B．unless I had caught |
| C．if ! did not catch | D．unless I caught |
________ is quite natural,a beginner can't read the books written in English
very quickly.
| A．Which | B．As | C．What | D．It |
—Do you regret paying 500 dollars for your necklace?
--No, I would gladly pay__________ for it.
| A．two times as much | B．twice as many |
| C．twice as much | D．as twice as much |