One learns a language by making mistakes and________ them.
| A．correct | B．correcting | C．corrects | D．to correct |
Could I speak to ____________ is in charge of the company?
| A．anyone | B．someone | C．whoever | D．no matter who |
What I need is ___________ book that contains ____________ ABC of oil painting.
| A．a; / | B．a; the | C．the; an | D．the; / |
It was in the Xichang Satellite Launch Center , ________ I had visited, ________ Chang’eⅠwas launched at about 6:05 pm October 24, 2007.
| A．where; that | B．which; that | C．that; where | D．which; where |
After the class was over, the student apologized _______ the teacher ______ his coming late.
| A．/; because | B．/; for | C．to; because | D．to; for |
_____________ well prepared you are, you still need a lot of luck in mountain climbing.
| A．However | B．Whatever | C．No matter | D．Although |