It is ten years _____ I lived in Nanjing, so I know ____ about what it is like today.
| A．since; nothing | B．that; everything | C．before; something | D．since; anything |
He was born ____ a very cold night _____ December.
| A．in; in | B．In; of | C．on; in | D．on; of |
When he knocked at the door, my mother was busy ____ supper.
| A．preparing for | B．in preparing |
| C．to prepare for | D．to prepare |
He waited until it was dark ____ nobody could see him clearly.
| A．so that | B．in order to | C．although | D．however |
Now there are many _____ in our company.
| A．woman doctor | B．women doctor |
| C．woman doctors | D．women doctors |
We should think of ways to stop the waste from the factory _____ our living environment.
| A．being polluted | B．polluting | C．from being polluted | D．polluted |