_______from the moon, our earth, with water _____about 70 percent of its surface, appears like a blue ball.
| A．Seen; covered | B．Seeing; covering |
| C．Seen; covering | D．Seeing; covered |
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 |