---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 |
. --Can I help you?
--I'd like to buy a present for my father's birthday, ___________ at a proper price but of great use.
| A．one | B．anyone | C．that | D．everything |
. I just don't understand_____________ that prevents so many Americans from being as happy as one might expect.
| A．why it does | B．what it does |
| C．what it is | D．why it is |
. My pain ___________ obvious the moment I walked into the room, for the first man I met asked me pitifully:" Are you feeling all right?"
| A．must be | B．must have been |
| C．could be | D．could have been |
The fire started in the basement and quickly____________ to the first floor where it destroyed all the______________ in the language lab.
| A．was spreaded;furniture and equipments |
| B．was spreaded ;furniture and equipment |
| C．spread;furnitures and equipments |
| D．spread ;furniture and equipment |
What he has done is far from___________.
| A．satisfactory | B．satisfied |
| C．satisfaction | D．satisfy |