农村劳动力城市就业领域比例最高的是()。
A. 商业饮食业
B. 服务业
C. 工业、交通、运输业
D. 其他行业
The second paragraph intends to tell us about ______.
A. general traits of the Americans
B. the reason why Americans tolerate and accept different family types.
C. the social customs in American society
D. the result of the social changes.
How many types of families are mentioned by the writer？
A. Six.
B. Two.
C. Five.
D. Four.
What percent did the families headed by one parent account for？
A. 50 percent.
B. 40 percent.
C. 35 percent.
D. 22.5 percent.
微信支付 
支付宝支付