When it air pollution, Beijing faces the three “C” s，cars，coal and construction，which lead to Beijing's thick air pollution．
| A．refers to | B．comes to | C．happens to | D．speaks to |
All over the world the mobile phone has become _____ people would now call a necessity.
| A．which | B．that | C．what | D．when |
Either the driver killed in the car or the lucky passenger questioned by the police ______ them very puzzled how this accident has happened.
| A．make | B．makes | C．was making | D．were making |
I was told that the water of the Ganjiang River is much cleaner than ____ of the Xiangjiang River.
| A．those | B．one | C．that | D．ones |
She didn’t allow the accident to discourage her. On the contrary, she began to work.
| A．as twice hard | B．twice as hard |
| C．twice as harder | D．harder twice |
Thank you for the great effort you _____ to find us the right person for the job．
| A．had | B．got | C．took | D．made |