_____ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.
| A．While | B．As | C．If | D．Since |
Jack,you’re so lazy!This jobhours ago.
| A．should finish | B．must have finished |
| C．ought to have been finished | D．was about to finish |
Hehave come here yesterday,he?
| A．mustn’t;did | B．couldn’t;has | C．mustn’t;haven’t | D．must;didn’t |
At last hefinish the work ahead of time.
| A．could | B．was able to |
| C．could have done | D．would have been able to |
—Is the flight from Shanghai on time?
—Of Course,it is.Itbe arriving in 10 minutes at Gate 9.
| A．must | B．should | C．may | D．can |
—Shall we go skating or stay at home?
—Whichdo yourself?
| A．do you rather | B．would you rather |
| C．will you rather | D．should you rather |