Up to now, they _______enough money for students who can’t afford to go to school.
| A．are raising | B．have been raising | C．have raised | D．had raised |
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 |
In my opinion, all Mr. White ___ good to his students in his class at present. He is very strict in their study.
| A．does does does | B．does do do |
| C．does does do | D．did do does |