41.______ anywhere in the United States costs less than a dollar when you dial it yourself.
a. ? ? ? ?Three minutes call ? ?c. A three-minutes call
b. ? ? ? ?Three-minute call ? ? d. A three-minute call?

42.The ______ about nuclear energy revolves around the waste problem.
a. ? ? ? ?public’s chief concern ? ?c. chief public concern
b. ? ? ? ?public chief concern ? ? ?d. chief concern of public’s?
?
43.______ the first and largest ethnic group to work on the construction of the transcontinental railroad.?
a. ?Chinese were ? ?b. The Chinese was ?
?c. Chinese was ? ?d. The Chinese were
?
44.______ can get a better view of the game than the participants.
a. ? ? ? ?Looker-on ? ?b. Lookers-on ? ?c. Looker-ons ? ?c. Lookers-ons?
?
45.A group of spectators was dispersed by the police who ______ at the scene of the accidents within minutes.?
a. ? ? ? ?were ? ?b. have been ? ?c. was ? ?d. has been?
?
46.Our livestock ______ not as numerous as they used to be.
a. ? ? ? ?is ? ?b. are ? ?c. be ? ?d. been?
?
47.One of the most surprising things is that ______ may come from petroleum.
a. ? ? ? ?much of tomorrow food ? ? ? ?c. many of tomorrow’s food
b. ? ? ? ?much of the food of tomorrow ? d. much of tomorrow’s food
?
48.Scott is an orphan but he received ______.?
a. ? ? ? ?very good education ? ? ? ? ? ? ?c. a very good education
b. ? ? ? ?very good educations ? ? ? ? ? ? d. many good educations?
?
49.After several day’s hardworking, we have made ______ on the design.
a. ? ? ? ?much improvement ? ? ? ? ? ? ? ? c. many improvement
b. ? ? ? ?several improvements ? ? ? ? ? ? ? d. some improvement?
?
50.The boy was very happy that his mother bought him a new pair of shoes at a ______ yesterday.
a. ? ? ? ?shoes shop ? ?b. shoe shop ? ?c. shoes’s shop ? ?d. shoe’s?
?
【答案解析】
DADBA ? BDBCB