Urbanization and ItsInfluence

Over half theworld's people now live in cities.The latest"Global Report on HumanSettlements"says a significant change took place last year. Thereport_______(51)this

week fromU.N.Habitat,a United Nations agency.

A centuryago,_______(52)than five percent of all people lived in cities._______(53)themiddle of this century it could be seventy percent,or_______(54)six and a halfbillion

people.

Alreadythree-fourths of people in_______(55)countries live in cities.Now most urbanpopulation_______(56)is in the developing world.

Urbanization canlead to social and economic progress,but also put_______(57)on cities toprovide housing and_______(58).The new report says almost two hundred

thousand people move_______(59)cities and towns each day.It says worseninginequalities,_______(60)by social divisions and differences in_______(61),couldresult in

violence and crimeunless cities plan better.

Another issue isurban sprawl（无序扩展的城区）.Thisis where cities_______(62) quickly into rural areas,sometimes_______(63)a muchfaster rate than urban population

growth.

Sprawl is common inthe United States.Americans move a lot. In a recent study,Art Hall at the University of Kansas found that people are moving awayfrom the_______(64)

cities to smallerones.He sees a_______(65)toward"de-urbanization"across the nation._________(56)

A..extension

B.raise

C.addition

D.growth