More trees and flowers should planted to make our hometown beautiful.（）

______ more attention,the trees could have grown better.

A. Togive

B. Havinggiven

C. Given

D. Giving

Many more trees （) （plant) next year.

The number of the trees around my village is getting _________.

A、larger and larger

B、higher and higher

C、more and more

D、less and less

_______more attention, the young trees could have grown much better.

A. To give

B. Given

C. Give

D. Having given

The administrator is ______.

A．a "trained" man who is more a specialist than a generalist

B．a man who sees the trees as well as the forest

C．a man who is very strong in the humanities

D．a man who is an "educated" specialist

A.a man whose job is to train other people

B.a man who has been trained in more than one field

C.a man who can see the forest rather than the trees

D.a man whose concern is mainly with technique and tools

A.We should plants more trees and flowers.

B.We should clean the banks of our rivers.

C.We should know what will happen in the future.

D.We should know what we must do and begin to do now.

A．We should clean the banks of our rivers

B．We should know what will happen in the future

C．We should know what we should do and do it now

D．We should plant more trees and flowers

urope until about the year 1100. Scandinavia——which now makes a great deal of the world’s paper——did not begin to make it until 1500. Most paper is made from wood. Paper-making is an important industry and paper from Britain is sold to many countries such as Australia and South Africa.Some of the wood used in the British paper making industry comes from trees grown in Britain,but wood is also bought from other countries such as Norway.One tree is needed for every four hundred copies of a forty-page newspaper.If half the adults in Britain buy one daily paper,this uses up over a thousand trees a day.All over the world,trees are world, trees are being cut down faster than they are being planted, so there may be a serious need for paper at the beginning of next century . When we think of paper, we think of newspaper, books, letters and writing paper.But there are many other uses.Only half of paper is used for books,and newspaper,etc. Paper is very good for keeping you warm.Each year,more and more things are made of paper. But the latest in paper making seems to be paper houses. Wher was paper invented？ A. In China

B. In southern Europe

C. In Scandinavia

D. In Britain

Scandinavia began to make paper__________.A.in 1100

B.in 1400

C.in 1500

D.in the first century

Every four hundred copies of a forty-paper newspaper will need _____________.A.half a tree

B.one tree

C.two trees

D.more than one tree

All over the world, trees are being cut down___________than they are being plantedA.more slowly

B.much faster

C.much more slowly

D.faster

The latest things made of paper are___________.A.chairs

B.tables

C.clothes

D.houses

请帮忙给出每个问题的正确答案和分析，谢谢！

【C1】______protecting the soil, providing water and【C2】______the climate. Trees【C3】______soil to mountainsides. Hills【C4】______the trees have been felled lose 500 times as【C5】______soil a year as those with trees.

Trees catch and【C6】______rainwater. Their leaves break the impact【C7】______the rains, robbing them of【C8】______destructive power. The roots of trees allow the water to go into the soil,【C9】______gradually releases it to flow down rivers and refill ground-water reserves. Where there are no【C10】______, the rains run in sheets of water off the land,【C11】______the soil with there Land【C12】______with trees and other plants【C13】______20 times more rainwater than【C14】______earth. As they grow, trees absorb carbon dioxide, the main【C15】______of the "greenhouse effect", which【C16】______irreversibly to change the world's climate. Together, the world's trees, plants and soils contain three times as much carbon as【C17】______is in the atmosphere.

The world's forests【C18】______the vast majority of its animal and plant species. The tropical rainforests【C19】______have well over half of them,【C20】______they cover only about 6% of the Earth's land surface.

【C1】

A．for

B．from

C．by

D．with