The two friends _____ on the Internet for three hours, and they would go on till the next morning.
| A．had been chatting | B．had chatted | C．were chatting | D．has been chatting |
Do you know that a living cell can be for a thousand years if the temperature is right?
| A．spared | B．protected | C．preserved | D．developed. |
Many experts seem to agree that certain limit should be set on consumption of cars to ease air pollution.
| A．a; the | B．/; the | C．the; / | D．the; a |
I have got _______ good news for you．You are to change _______ trains in Changsha and take _______ fast one.
| A．/; /; a | B．a; /; a | C．a; the; the | D．/; the; a |
As hiring _______ more global, both for employers and candidates, video interviewing is a way to speed up the interview process.
| A．became | B．has become |
| C．will become | D．had become |
—What should I wear to attend his wedding party?
—Dress ____ you like.
| A．what | B．however | C．whatever | D．how |