完形填空(阅读以下材料 回答第51——65题)Urbanization and Its Influ

完形填空(阅读以下材料，回答第51——65题)

Urbanization and Its Influence

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________(51)this week from U.N.Habitat,a United Nations agency.

A century ago,________(52)than five percent of all people lived in cities.________(53) the middle of this century it could be seventy percent,or ________(54)six and a half billion people.

Already three一fourths of people in________(55)countries live in cities.Now most urban population________(56)is in the developing world.

Urbanization can lead to social and economic progress,but also put________(57)on cities to provide housing and________(58).The new report says almost two hundred thousand people move________(59)cities and towns each day.It says worsening inequalities,________(60)by social divisions and differences in________(61),could result in violence and crime unless cities plan better.

Another issue is urban sprawl（无序扩展的城区）.This is where cities _________ (62) quickly into rural areas,sometimes________(63)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________(64)cities to smaller ones.He sees a________(65)toward"de-urbanization"across the nation.

_________(51)

A.came on

B.came over

C.came off

D.came out