Harrison Ford is thought to be one of the few movie stars ____ as a carpenter before.
| A．to work | B．to be working |
| C．to have worked | D．to have been working |
Jack wasn't saying anything, but the teacher smiled at him ________ he had done something very clever.(2011·湖南)
| A．as if | B．in case |
| C．while | D．though |
One third of the country ________ covered with trees and the majority of the citizens________black people.( 2011·湖南)
| A．is; are | B．is; is |
| C．are; are | D．are; is |
She showed the visitors around the museum, the construction ________had taken more than three years.(2011·江西)
| A．for which | B．with which |
| C．of which | D．to which |
If better use is ________ of your spare time, you'll make good progress in doing your business.
| A．spent | B．used for | C．taken | D．made |
The couple ________ a health centre in Cambodia，________ their seven year old son was born.
| A．run; which | B．control; where |
| C．run; where | D．control; which |