Tom was about to close the window ______ his attention was caught by a bird.
| A．when | B．if | C．and | D．till |
Since the forest has been destroyed by a big fire, a large ______ of trees ______ to be planted on the mountain．
| A．number; has | B．amount; has |
| C．quantity; have | D．sum; have |
Monkeys in the zoo started to show the flu _____ last Monday and altogether twenty have died up to now．
| A．symbol | B．sign | C．signal | D．symptom |
—I’m sorry to keep you waiting for so long．I’ll make short work of my lunch．
—____．I’m not in a hurry．
| A．Take it easy | B．Take your time |
| C．Not at all | D．Don’t be nervous |
For a moment nothing happened．Then _____ that the war was over．
| A．came the news | B．the news came |
| C．did the news come | D．did come the news |
_____ my advice, you would not be in such a terrible situation now．
| A．Had you taken | B．If you take |
| C．Should you take | D．If you have taken |