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【题目】 Choose the words of expressions and complete the passage why do leaves(树叶) change colour

One of nature's most beautiful_____is a forest full of bright autumn colors Imagine making art with all those colours of paint!

Leaves in their autumn colours are beautiful Did you ever wonder why a tree's leaves change colour To answer this question you need to_____the important job that leaves do

Leaves make food so the tree can grow and have energy This process is called photosynthesis (光合作用). Leaves need three things to do their job

1Leaves need water which they get from the tree_____their stem (茎).

2Leaves need a gas called carbon dioxide They take it in from the air around them

3All plants_____a chemical called chlorophyll(叶绿素),which gives leaves their green colour Leaves need sunlight too Sunlight and chlorophyll work together to turn water and carbon dioxide into a kind of sugar This sugar is the food that provides plants_____energy When they make food trees give off a gas called oxygen Animals need oxygen to live

Photosynthesis doesn't just help plants stay alive Photosynthesis_____makes food for all living things Some animals such as mice eat plants Other animals such as hawks eat the plant eaters Without plants what would hawks do for food

1A.recordsB.animalsC.sightsD.manners

2A.preventB.includeC.controlD.understand

3A.throughB.withC.aboveD.beside

4A.keep offB.rely onC.turn intoD.give up

5A.impossibleB.uselessC.convenientD.necessary

6A.almostB.alsoC.hardlyD.seldom

【答案】

1C

2D

3A

4B

5D

6B

【解析】

本文介绍了大自然最美丽的一个地方是一片充满明亮秋色的森林。树叶制造食物,使树木生长并获得能量。这一过程称为光合作用(光合作用)。树叶需要三件事来完成它们的工作。

1)叶子需要水,水是从树上获取的。2)树叶需要一种叫做二氧化碳的气体,它们从周围空气中吸入。3)所有的植物都称为叶绿素(Tug),它使叶子变绿。树叶也需要阳光。阳光和叶绿素共同作用使水和二氧化碳变成一种糖。这种糖是植物提供能量的食物。

1句意:大自然最美丽的景观之一是一片秋色明媚的森林。

考查名词。Arecords记录;Banimals动物;Csights风景;Dmanners举止。结合 a forest full of bright autumn colors森林里满是秋季明亮的颜色,故可知是风景,故选C

2句意:要回答这个问题,你需要了解剩下的重要工作。

考查动词。Aprevent阻止;Binclude包括;Ccontrol 控制;Dunderstand理解。结合 To answer this questionyou need to___2___the important job that leaves do.为了回答这个问题,需要弄明白树叶的重要作用,故选D

3句意:叶子需要水,水是从树上通过茎得到的。

考查介词。Athrough通过;Bwith和;Cabove……上面;Dbeside另外。结合Leaves need waterwhich they get from the tree树叶通过树茎获得水,故选A

4句意:所有的植物都依赖于一种叫做叶绿素的化学物质,这种化学物质使叶子呈现绿色。

考查短语。A. keep off不接近;Brely on 依靠;Cturn into 变成;Dgive up放弃。结合called chlorophyll(叶绿素),which gives leaves their green colour树叶是依靠叶绿素变换颜色,故选B

5句意:这种糖是为植物提供必要能量的食物。

考查形容词。Aimpossible 不可能的; B useless无用的; C convenient便利的; Dnecessary必须的。结合This sugar is the food that provides plants是提供给植物的必要的能量的食物,故选D

6句意:光合作用也为所有生物制造食物。

考查副词。Aalmost几乎;Balso也;Chardly几乎不; D seldom很少。结合Photosynthesis doesn't just help plants stay alive光合作用不仅仅让植物活着,makes food for all living things.给所有的生物作为食物,可知这里指的是光合作用的两个作用,故用also也,故选B

完形填空题与单项选择题不同,它给出的是一篇意思较为完整的短文。做该题型试题时,首先应跳过空格通读全文,以全文为背景,联系句子的上下文进行推理和判断,从4个选项中选出一项进行试填。考生可以从词义用法、固定搭配、逻辑推理和上下文的联系等方面去考虑。最后应再把全文通览一遍,细心检查所选答案能否使短文上下连贯,前后呼应,词句通顺,使短文意思完整。检查时还应从语法、惯用法、逻辑推理和事情发生的情节等方面进行考虑,以达到准确无误之目的。第1小题考查名词辨析。句意:大自然最美丽的景观之一是一片秋色明媚的森林。

Arecords记录;Banimals动物;Csights风景;Dmanners举止。结合 a forest full of bright autumn colors森林里满是秋季明亮的颜色,故可知是风景,故选C。第5小题是考查形容词辨析。句意:这种糖是为植物提供必要能量的食物。Aimpossible 不可能的; Buseless无用的;Cconvenient便利的;Dnecessary必须的。结合This sugar is the food that provides plants是提供给植物的必要的能量的食物,故选D

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