Carl is studying________food science at college and hopes to open up________meat processing factory of his own one day. (2012·安徽,21)
| A./;a | B./;the | 
| C.the;a | D.the;the | 
One-third of the country ______ covered with trees and the majority of the citizens ______ black people.
| A.is; are | B.is; is | 
| C.are; are | D.are; is | 
Only when he apologizes for his rudeness ______ to him again.
| A.I will speak | B.will I speak | 
| C.do I speak | D.I speak | 
It doesn’t matter if they want to come to your party, ______?
| A.doesn’t | B.does it | 
| C.don’t they | D.do they | 
It was with the help of the local guide ______ the mountain climber was rescued.
| A.who | B.that | C.when | D.how | 
—What’s all that noise about outside?
 —Oh, I forgot to tell you. The road to the railway station ______.
| A.will be widened | B.is to be widened | 
| C.has been widened | D.is being widened |