You are working too hard. You'd better keep a ________ between work and relaxation.
| A．promise | B．read | C．balance | D．diary |
It was not until dark ______ he found ___ he thought was the correct way to solve the problem.
| A．that; what | B．that; that | C．when; what | D．when; that |
Since the epidemic appeared last winter, it ______ about a hundred lives.
| A．takes | B．took | C．has taken | D．will take |
China won Olympic gold in the women's short track 3,000 metres relay on Wednesday, with Canada ____ the silver．
| A．picking up | B．taking up | C．looking up | D．bringing up |
_____ in the regulations that you should not tell other people the password of your e-mail account.
| A．What is required | B．What requires | C．It is required | D．It requires |
The conference has been held to discuss the effects of tourism ______ the wildlife in the area.
| A．to | B．on | C．at | D．with |