11.The fruit fresh in his fruit stand sells well.
A.looking B.looked C.look D.to be looked
解析：look为连系动词
12.—Really ? Who will give lecture ? What is it about ?
—Professor Chen , president of Beijing University . About pollution .
A.the ;a B.the;/ C.a ; the D.a ;/
解析：president 作同位语，前不加冠词。
13.There is a new problem in the popularity of private cars road conditions need to be improved .
A.involving ; that B.involved ; that
C.involved; where D.involving ; which
解析：be involved in ,that引导的同位语从句。
14. that there is no opposition , I will report it to the general manager .
A.To provide B.Be provided C.Having provided D.Providing
解析：provided that, providing that假如
15.Professor Smith has written some short stories , but he is known for his plays .
A.better ycy B.more C.best D.most
解析：be well known
16. in faraway northwest , this place has its beautiful fresh air .
A.Being located B.Located C.locating D.To be located
解析：be located in
17.Some friends tried to settle the quarrel between Mr. and Mrs. Brown without hurting the feeling of , but failed .
A.none B.either C.both D.neither
解析：either指两者中的任何一个
18.It’s not books you read but the way you read them that decides how successfully you gain knowledge .
A.a number of ; in which B.the number of ; /
C.a good many ; which D.quite a few ; in which
解析：强调句型，不是你读的数量而是你读的方式
19.Bird flu , a contagious disease of animals , is believed by viruses that normally infect only birds and less commonly pigs , and rarely humans .
A.caused B.being caused C.to be caused D.to have caused
20.The police got to was once an old school the peasants used as a store .
A.what , that YCY B.where , which C.where , that D.which , where
解析：what 等于 the place that 后为 that引导的定语从句。
