He was busy writing a story，only _________ once in a while to smoke a cigarette．
| A．to stop | B．stopping |
| C．to have stopped | D．having stopped |
Don’t be afraid of difficulties. They can help you______ experience, and experience can, in return, broaden your horizons.
| A．accompany | B．accumulate | C．abandon | D．acknowledge |
The research report published last month is very important______ it confirms the link between aggression and alcohol.
| A．as long as | B．in case | C．in that | D．even though |
China now aims to boost domestic demand, and this ______ would help the global economy.
| A．in short | B．on duty | C．on average | D．in turn |
I ______ the TV series The Legend of Zhenhuan when my mom made a phone call to me.
| A．am watching | B．watching | C．was watching | D．was watched |
A strong earthquake struck Lushan county, a district of Yaan, ______ more than 100 people and ______ hundreds of others, local authorities said.
| A．killing; injured | B．killed; injuring |
| C．killing; injuring | D．kill; injure |