Driving in rush hour traffic __________ be very dangerous, so you __________ be too careful.
| A．should; ought to | B．could; should |
| C．might; mustn’t | D．can; can’t |
—______the population of China?—______over 1,300,000,000.
| A．How many are; They are |
| B．How’s; It’s |
| C．What’s; It’s |
| D．How much is; It’s |
The sun is shinning, ______ it isn’t warm today.
| A．or | B．and | C．because | D．but |
—I think we should work harder than before.—I agree________ you.
| A．on | B．to | C．with | D．for |
Jessica, ______ late for school again. — Sorry, I won’t.
| A．isn’t | B．doesn’t be |
| C．don’t be | D．won’t be |
It's getting dark. We'd better go home_______.
| A．on bus | B．by Mike's car |
| C．in Mike's car | D．take a bus |