What ____ you ______ at this time yesterday?
| A．did ; do | B．is; doing | C．were; doing | D．are ; doing |
It is such that you muston it.
| A．hard work; work hard | B．a hard work; hard work |
| C．work hardly; work hard | D．hard work; work hardly |
Middle school students _________ smoke because it is bad for their health.
| A．needn’t | B．couldn’t |
| C．shouldn’t | D．may not |
The old book there ______ some strange pictures in it. Nobody can understand them.
| A．are | B．is | C．has | D．have |
--- Did you go to Jack’s party last night? ---- No, I ______.
| A．didn’t invite | B．haven’t invited |
| C．am not invited | D．wasn’t invited |
Have you seen a tall boy ______ a basketball ______into the building?
| A．has; run | B．have; running |
| C．with ; run | D．with; running |