Over half the world's people now live in cities. The latest "Global Report on Human Settlements" says a significant change took place last year. The report 21 this week from U.N. Habitat, a United Nations agency.
A century ago, 22 than five percent of all people lived in cities. 23 the middle of this century it could be seventy percent, or 24 six and a half billion people.
Already three-fourths of people in 25 countries live in cities. Now most urban population 26 is in the developing world.
Urbanization can lead to social and economic progress, but also put 27 on cities to provide housing and 28 . The new report says almost two hundred thousand people move 29 cities and towns each day. It says worsening inequalities, 30 by social divisions and differences in 31 , could result in violence and crime unless cities plan better.
Another issue is urban sprawl (无序展的城区). This is where cities 32 quickly into rural areas, sometimes 33 a much faster rate than urban population growth.
Sprawl is common in the United States. Americans move a lot. In a recent study, Art Hall at the University of Kansas found that people are moving away from the 34 cities to smaller ones. He sees a 35 toward "de-urbanization" across the nation.

A、 came on
B、 came over
C、 came off
D、 came out

【正确答案】 D

【答案解析】 come out：出版、发表；come on：开始、接着来；come over：过来、顺便来访；come off：结果、脱落。这里指发表报告。所以选D项。