Children _______ sit in the front seat of a car. It’s too dangerous.
| A．need | B．needn’t | C．must | D．mustn’t |
—Is David coming by train?
—He should, but henot. He likes driving his car.
| A．can | B．need | C．must | D．may |
US First Lady Michelle Obama encouraged students to study abroad in herwhen visiting Peking University on March 22, 2014.
| A．story | B．speech | C．letter | D．diary |
Be quick, ___________ we’ll be late for the meeting.
| A．and | B．but | C．so | D．or |
________ useful advice you gave us!
| A．How a | B．What an | C．What | D．How |
—Did you enjoy the party yesterday?
–-________, so I left early.
| A．It was funny | B．I enjoyed it |
| C．It was boring | D．I haven’t been there |