11.Urban gardening came into being as a result of

A.the lack of land for gardening

B.new technology

C.government encouragement

D.the increasing population

12.The word“confined'(Para.2)means

A.open

B.empty

C.limited

D.occupied

13.Plants grown on windowsills require a lot of.A.water

B.space

C.soil

D.sunlight

14.Raised beds are popular because they

A.are efficient

B.are cheap

C.last long

D.contain fetilizers

15.Community gardening is beneficial because it

A.saves more land

B.requires less work

C.increases output

D.connects people

【参考答案】

11.A 12.C 13.D 14.B 15.D