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 |
The Greens must have been to 2010 Shanghai Expo, __________ they?
| A．hadn't |
| B．didn't |
| C．can't |
| D．weren't |
Everyone in the village hoped that he would __________ after a few days' treatment.
| A．pick up |
| B．come up |
| C．keep up |
| D．make up |
—Have you met Mr. Smith recently?
—Sorry, I haven't, but I hear he is working at __________ company.
| A．some |
| B．any |
| C．each |
| D．every |
I have been told that the new law will come into __________ on January 1st next year.
| A．effect |
| B．use |
| C．service |
| D．existence |
Each person has his / her unique character which __________ him / her from others.
| A．differs |
| B．distinguishes |
| C．divides |
| D．draws |