【題目】 Choose the words of expressions and complete the passage why do leaves(樹葉) 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 (莖).

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

3All plants_____a chemical called chlorophyll(葉綠素),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】

本文介紹了大自然最美麗的一個(gè)地方是一片充滿明亮秋色的森林。樹葉制造食物,使樹木生長(zhǎng)并獲得能量。這一過程稱為光合作用(光合作用)。樹葉需要三件事來完成它們的工作。

1)葉子需要水,水是從樹上獲取的。2)樹葉需要一種叫做二氧化碳的氣體,它們從周圍空氣中吸入。3)所有的植物都稱為葉綠素(Tug),它使葉子變綠。樹葉也需要陽光。陽光和葉綠素共同作用使水和二氧化碳變成一種糖。這種糖是植物提供能量的食物。

1句意:大自然最美麗的景觀之一是一片秋色明媚的森林。

考查名詞。Arecords記錄;Banimals動(dòng)物;Csights風(fēng)景;Dmanners舉止。結(jié)合 a forest full of bright autumn colors森林里滿是秋季明亮的顏色,故可知是風(fēng)景,故選C。

2句意:要回答這個(gè)問題,你需要了解剩下的重要工作。

考查動(dòng)詞。Aprevent阻止;Binclude包括;Ccontrol 控制;Dunderstand理解。結(jié)合 To answer this question,you need to___2___the important job that leaves do.為了回答這個(gè)問題,需要弄明白樹葉的重要作用,故選D。

3句意:葉子需要水,水是從樹上通過莖得到的。

考查介詞。Athrough通過;Bwith和;Cabove……上面;Dbeside另外。結(jié)合Leaves need water,which they get from the tree樹葉通過樹莖獲得水,故選A。

4句意:所有的植物都依賴于一種叫做葉綠素的化學(xué)物質(zhì),這種化學(xué)物質(zhì)使葉子呈現(xiàn)綠色。

考查短語。A. keep off不接近;Brely on 依靠;Cturn into 變成;Dgive up放棄。結(jié)合called chlorophyll(葉綠素),which gives leaves their green colour樹葉是依靠葉綠素變換顏色,故選B

5句意:這種糖是為植物提供必要能量的食物。

考查形容詞。Aimpossible 不可能的; B useless無用的; C convenient便利的; Dnecessary必須的。結(jié)合This sugar is the food that provides plants是提供給植物的必要的能量的食物,故選D。

6句意:光合作用也為所有生物制造食物。

考查副詞。Aalmost幾乎;Balso也;Chardly幾乎不; D seldom很少。結(jié)合Photosynthesis doesn't just help plants stay alive光合作用不僅僅讓植物活著,makes food for all living things.給所有的生物作為食物,可知這里指的是光合作用的兩個(gè)作用,故用also也,故選B。

完形填空題與單項(xiàng)選擇題不同,它給出的是一篇意思較為完整的短文。做該題型試題時(shí),首先應(yīng)跳過空格通讀全文,以全文為背景,聯(lián)系句子的上下文進(jìn)行推理和判斷,從4個(gè)選項(xiàng)中選出一項(xiàng)進(jìn)行試填。考生可以從詞義用法、固定搭配、邏輯推理和上下文的聯(lián)系等方面去考慮。最后應(yīng)再把全文通覽一遍,細(xì)心檢查所選答案能否使短文上下連貫,前后呼應(yīng),詞句通順,使短文意思完整。檢查時(shí)還應(yīng)從語法、慣用法、邏輯推理和事情發(fā)生的情節(jié)等方面進(jìn)行考慮,以達(dá)到準(zhǔn)確無誤之目的。第1小題考查名詞辨析。句意:大自然最美麗的景觀之一是一片秋色明媚的森林。

Arecords記錄;Banimals動(dòng)物;Csights風(fēng)景;Dmanners舉止。結(jié)合 a forest full of bright autumn colors森林里滿是秋季明亮的顏色,故可知是風(fēng)景,故選C。第5小題是考查形容詞辨析。句意:這種糖是為植物提供必要能量的食物。Aimpossible 不可能的; Buseless無用的;Cconvenient便利的;Dnecessary必須的。結(jié)合This sugar is the food that provides plants是提供給植物的必要的能量的食物,故選D

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