完形填空Since the earliest times,trees have been always very use

完形填空
Since the earliest times,trees have been always very useful and __1__to man who made use of them in many ways for his daily life.Even today trees continue to serve man in so many useful ways.
They _2 ___man with food,fuel for burning and building material in the form of wood.__3___trees it would he impossible __4___houses,boats and even bridges,Furniture such as tables,chairs and cupboards __5___ also made of wood.
In the tropics where it is very warm __6___ the year,trees protect man from the fierce heal of the sun.They are also useful in preventing good and fertile (肥沃的) lop soil from _ __7___away during heavy rains which are so common in the tropics.
If there were no trees __8___vegetation (植被) of some sort to hold ___9___ the soil with their__ 10___ ,heavy rains would wash away the __11___surface soil,so necessary for agriculture.The result is that the land becomes __12___ and unproductive.
There are many desert areas in the world.A long,long lime __13__ these areas _14____very rich,fertile areas.But _15 ignorant people in ancient times 16 great quantities of trees,they never considered planting 17 .Strong 18 gradually blew away the rich surface soil and at last the 19 was turned into useless desert where 20 could grow.
1.A.possible B.important C.impossible D.expensive
2.A.give B.need C.provide D.take
3.A.Without B.Unless C.No D.Not having
4.A.set up B.to found C.establish D.to build
5.A.had been B.have been C.are D.is
6.A.all of B.entire C.whole D.throughout
7.A.being washed B.running C.washing D.being flown
8.A.and B.or C.as well as D.either
9.A.up B.back C.firmly D.high
10.A.leaves B.trunks C.brandies D.roots
11.A.poor B.much C.rich D.thin
12.A.useful B.useless C.beautiful D.strong
13.A.ago B.after that C.passed D.before
14.A.must have B.maybe have C.perhaps was D.must have been
15.A.because of B.for C.because D.as
16.A.planted B.grew C.put away D.cut down
17.A.new trees B.vegetables C.crops D.grass
18.A.fogs B.winds C.snow D.rains
19.A.surface B.earth C.land D.soil
20.A.something B.anything C.everything D.nothing
我自己做了,请各位写个正确的让我对对...

BCADD AABBD CBADD DABCD
跟楼上有几个不一样的...自己分析一下..
一个是第5题..主语是FURNITURE,为单数..但是动词的单复数也有就近原则..一直没怎么搞明白..所以还是选了单数的BE动词..
然后是第8题,因为是否定,所以觉得应该是NO...OR...
第15题,我觉得原文的意思应该是,古代的人一方面因为愚昧砍倒树木,一方面却不种植新的树木.所以选择了AS.而并非是因为古代的人愚昧,所以砍倒树木,而且不种植新的树木.用BECAUSE OF感觉在句意上看不出因果关系.
最后一题,明显是NOTHING COULD GROW了..用ANYTHING COULD GROW就变成什么都可以生长了...
我以上的解释是和STEVEN HAM对下来后,对我们不统一的几个答案的注释..