______children get older, Doherty said, their brains may develop the ability to indentify visual context.
| A．As | B．When | C．While | D．Since |
Mr. Green stood up in defense of the 16-year-old boy, saying that he was not the one .
| A．blamed | B．blaming | C．to blame | D．to be blamed |
A clean environment can help the city bid for the Olympics, which will promote its economic development.
| A．in nature | B．in return | C．in turn | D．in fact |
The new chairman was quite familiar with the for conducting a meeting.
| A．question | B．people | C．procedure | D．problem |
There is a new problem in the popularity of private cars road conditions need to be improved .
| A．involving ; that | B．involved ; that | C．involved; where | D．involving ; which |
In the face of all these difficulties, we’re not discouraged and our spirits well.
| A．keep up | B．go up | C．hold up | D．pick up |