The American girl has a good __________ of Chinese and can express herself freely in the language.
| A．item |
| B．series |
| C．command |
| D．usage |
How ______ you say that you really understand the whole story if you have covered only part of the article ?
| A．can | B．must | C．need | D．may |
— What's the matter with the man hanging his head there?
— Well, if you _____ know, he was caught stealing my bike.
| A．must | B．may | C．can | D．shall |
— Lisa hasn't lived here for long. She _____ know many people.
| A．needn’t | B．can’t | C．shouldn’t | D．didn’t |
— There's someone outside. Who it be ?
— It must be Mary. She promised to come over at 8: 00.
| A．must | B．can | C．shall | D．need |
Recently quite a lot of experts _____ that another law on wildlife protection ____ as soon as possible.
| A．suggested; must be passed | B．have suggested; be passed |
| C．were suggesting; was passed | D．suggested; being passed |