How this kind of plant can be ____ in a special way is still unknown to us.
| A．kept away | B．kept out | C．kept alive | D．kept off |
——Do you know what your problem is?
—Yes. I always overwork to ________ for lost time.
| A．sit up | B．keep up |
| C．make up | D．hold up |
Don't park your car here, please. It'll ________ the traffic.
| A．turn up | B．hold up |
| C．stand up | D．get up |
Only after he was brought to the police station did the young man ________ he had stolen some purses from other passengers.
| A．participate | B．realize |
| C．summarize | D．acknowledge |
Changing the design of a new product may ________ the risk of its production in the market.
| A．bring about | B．come about |
| C．bring up | D．come up |
When chatting on the Internet by typing in English, you can ________ articles, subjects, etc. to make the sentences shorter.
| A．get off | B．leave out |
| C．turn in | D．make up |