Two fifths of the police _____ in the school near the town.
| A．has trained | B．have trained | C．has been trained | D．have been trained |
“China is still a developing country ___________.” said Premier Li at the conference.
| A．at present | B．for present |
| C．to present | D．to now |
The policeman warned us ___________ believe such liars again.
| A．not | B．don’t |
| C．didn’t | D．not to |
I am sure that if you _____________ your time, you’ll achieve greater success.
| A．make full use o | B．take use of |
| C．use up | D．are used to |
He got home late ____________ the traffic was heavy.
| A．because that | B．because |
| C．because of | D．in order that |
I think it was his attitude ___________ annoyed the teacher.
| A．which | B．what |
| C．that | D．to which |