Sorry to say I’m busy now and can’t help ______ the lab.
| A．to tidy | B．tidying |
| C．being tidy | D．but tidy |
Traffic restrictions have come into effect in Beijing to improve the
capital’s air quality and traffic situation for the 2008 Olympics．
| A．in order that | B．in an attempt | C．at an attempt | D．in a try |
Modern China is experiencing a completely new periodrespect for science and creativity has become the guiding principle of society．
| A．which | B．where | C．in which | D．that |
Russia will soon return 174 sq km of territory on the northeast border to China．
more than 40 years of negotiations．
| A．ending | B．ended | C．to end | D．being ended |
In the 1990s．a trip to Zhangjiajie cost less than 500 yuan，but now with the same amount of money youeven cover the entrance fee．
A．couldn’t B shall’t C．can’t D．won’t
We should treasure friendship，for a friend is easier lost than．
A．find B．to find C．finding D found