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Plants are very important living things. Life could not go on if there were no plants. This is   1  plants can make food from air, water and sunlight. Animals and men   2 make food from air, water and sunlight. Animals get their food by eating plants and animals   
 3   Therefore(因此), animals and  men need plants in order to   4  This is the reason(原因) why we find that there are so many plants around us.
If you look carefully at the plants around you   5   find that there are many kinds of plants. Some plants are large   6   others are small. Most plants are green..
Some plants have many small leaves. Others have only   7  large leaves. There are many kinds of leaves. Leaves are of  8    shapes(形状) and colors.
Leaves are also different in other ways. Some leaves have short leaf stalks(叶茎)while others have long leaf stalks. Still others have  9   stalks at all. The edges(边)of leaves are also different. Some leaves have smooth(光滑的)edges. Some have wave(波状的) edges    10   the teeth of saw(锯).
小题1:
A.whyB.becauseC.howD.that
小题2:
A.don’tB.notC.cannotD.can
小题3:
A.tooB.eitherC.alsoD.already
小题4:
A.eatB.liveC.haveD.get
小题5:
A.are going toB.mayC.certainlyD.will
小题6:
A.whenB.yetC.andD.while
小题7:
A.a littleB.a fewC.littleD.few
小题8:A. much          B. different         C. same            D the same
小题9:
A.notB.noneC.neitherD.no
小题10:
A.likeB.asC.as ifD.seem

小题1:B
小题2:C
小题3:A
小题4:B
小题5:D
小题6:D
小题7:B
小题8:B
小题9:D
小题10:A

小题1:根据前后句子的关系为因果关系,故选B,表示因为的意思。
小题2:根据上下文的内容可知答案为C,表示不能够做某事,故选C
小题3:too 表示也时,位于句子末尾,故选A
小题4:in order to ,表示为了做某事,根据上下文的意思,可知答案为B,表示生活的意思。
小题5:在if 引导的从句中If you look carefully at the plants around you   5   find that there are many kinds of plants.如果主句为一般将来时,从句用一般现在时代替将来时。
小题6:while 在此表示然而的意思,也含有与此同时的意思,故选D
小题7:only a few ,表示只有一点点,故选B
小题8:根据前文的内容,可知答案为B,表示不同的,故选B
小题9:not ···at all ,表示一点儿也不,故选D
小题10:like 表示像···一样,为介词,符合题意。
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