He cut off the electricity immediately he found the dangerous situation, thus ____ a fire accident.
| A．prevented | B．to prevent | C．would prevent | D．preventing |
I’dliketoknow______Chinese.
| A．whenhebegantolearn | B．whendidhebegintolearn |
| C．whendidhebeginlearning | D．forhowlonghebegantolearn |
Was it 80 years before Christopher Columbus crossed the Atlantic ______ Zheng He hadsailed to East Africa?
| A．when | B．that | C．after | D．since |
Time should be made use ______ meaningful things.
| A．of to do | B．of doing | C．to do | D．doing |
Last night, your mobile phone was always busy. I couldn’t ______ to you after several attempts.
| A．go over | B．get through | C．get along | D．go through |
At this time next year______ our holiday in Beijing..
| A．we’re having | B．we’ll be having |
| C．we’ll have | D．we’re to have |