---Tell us, Mark, what is the cause of the American Civil War?
---Well, is it _______the black slaves wanted freedom?
| A．how | B．why |
| C．because | D．when |
Look at the dark clouds in the sky. It looks_______ it is going to rain soon.
| A．as though |
| B．although |
| C．even though |
| D．even if |
He didn't_______ to us why he broke into the house when he had the key to the house.
| A．tell |
| B．explain |
| C．inform |
| D．speak |
We believe that sports can_______ mind and body.
| A．develop |
| B．help |
| C．increase |
| D．exercise |
Disney Parks in Tokyo, in Europe and in America _______ by the same company.
| A．are all run |
| B．all run |
| C．all work |
| D．are all operated on |
The days _______we spent together on the farm are not easy _______．
| A．when; to forget |
| B．which; to be forgotten |
| C．that; to forget |
| D．\; to be forgotten |