11. Yesterday a scientist, together with some assistants, 　　　　　sent to the flooded area to help solve that problem.

A. were　　　　　　 　 B. are　　　　　　　　　　　　　 C. was　　　　　　　　　　　　　 D. has

10. So far we 　　　　　a lot to build a low-carbon economy, but it is far from ideal. We still have to work harder.

A. did　　　　　　 　 B. do　　　　　　　　　　　　　 C. had done　　　　 　　 D. have done

9. 　　　　　for an important interview, he sat up until late into the night.

A. Prepared　　　　　　　　　 B. Having prepared　　 　　　 C. To prepare　 　　　　　　 D. Being prepared

8. I 　　　　　50 dollars for the taxi ride to the airport, which should have been only 25 dollars, as I later found out.

A. had been charged　　　 B. had charged　　　　　　　 C. has been charged　　　 D. charged

7. We should strictly and voluntarily follow traffic rules, stopping at the red traffic light 　　　　　complaining about traffic jams.

A. rather than　　　　　　　 B. other than　　　　　　　　 C. more than　 　　 　　 D. less than　

6. His writing is so confusing that it’s difficult to 　　　　　what he is trying to express.

A. come out　　　　 　 B. make out　　　 　　　 C. hand out　　　　 　　 D. try out

5. After 　　　　　with her daughter and manager, she decided to play the role in the film on one condition.　

A. beginning　　　　　　　　 B. covering　　　　　　　　　 C. consulting　　　　　　　　 D. dealing

4. In the end, the young teacher improved his teaching quality 　　　　　the guidance of his headmaster.

A. at　　　 　　　　　　　　　　　　　　 B. under　　　　　　　　　　　 C. in　　　　　　　　　　　　　　　　　 D. through

3. To allow the free flow of information and let everybody open up, we have to communicate with each other in a 　　　　　way.

A. facial　　　　　　　　　　　 B. central　　　　　　　　　　　　　　 C. mental　　　　　　　　　　　　　　 D. casual

2. I tend to doubt the 　　　　　of separating a baby from its family, whatever the conditions.

A. wisdom　　　　　　　　　　 B. freedom　　　　　　　　　 C. guidance　　　　 　　 D. patience