Beijing is ______ the north of Gansu and ______ the north of China.
| A．to; in | B．on; in |
| C．in; to | D．in; on |
— I called you yesterday but no one answered.
— Well, Maybe I in the garden at that time.
| A．worked | B．am working | C．was working | D．would work |
We won’t start the meeting our teacher arrives.
| A．while | B．until | C．when | D．or |
I find hard to get on with him.
| A．that | B．this | C．it | D．is |
Grand ma is now at .
| A．the doctor’s | B．the doctors | C．the doctor | D．doctor’s |
The old lady didn’t know when the house caught fire.
| A．how to do | B．how to do with it | C．what to do | D．what to do it |