I know Mr. Brown; we ______ to each other at an international conference.
| A．are introduced | B．are been introduced |
| C．were introduced | D．had been introduced |
The weight of the moon is only about _____ of that of the earth.
| A．one eighty | B．one of eighty | C．one the eightieth | D．one eightieth |
My partner wants to keep the company small _____ I’d like to expand it.
| A．and | B．or | C．however | D．while |
When and where this took place _____ still unknown.
| A．is | B．has | C．were | D．are |
— Are you almost ready to go, mom? I’ll go and pull the car out of the garage.
— OK- just _____. I’ll have a last look at the windows.
| A．wait | B．a minute | C．calm down | D．no way |
— Hello, may I have an appointment with the doctor?
— _____
| A．Sorry, he is busy at the moment. | B．Why didn’t you call earlier? |
| C．Certainly, may I have your name? | D．Sorry, he doesn’t want to see you. |