【題目】Rebecca wants to know more about trees and how they help us. Dr. Jones is telling her something 1trees.

Trees help in many ways. They keep the air cool and clean. They take in 2 (harm) gases from the air and produce oxygen for us 3(breath). They are major 4(fight) against air 5 (pollute). Besides, trees can also make our lives even 6 (convenient). Many of the things in our daily lives come from trees. For example, paper and pencils. 7 (actual), we get a lot more from trees. We get fruit and oil from them. Tea also comes from the leaves of trees. Look around this room. Most of 8furniture is made of wood. Trees are really important in our daily lives. So we can’t imagine what the world would be like 9 there were no trees.

However, we cut down millions of trees every year. We must stop 10 (protect) them if we don’t want a world without trees.

【答案】

1 about

2 harmful

3 to breathe

4 fighters

5 pollution

6 more convenient

7 Actually

8 the

9 if

10 to protect

【解析】

本文介紹了有關樹木的知識,以及它們是如何幫助我們的。文中介紹了樹木的作用。在最后呼吁我們要停止砍伐樹木,保護它們。

1句意瓊斯醫(yī)生正在給她講一些關于樹的事。tell sb. about sth. 告訴某人有關……的事;用介詞about。故填:about。

2句意它們吸收空氣中的有害氣體,產(chǎn)生氧氣供我們呼吸。gases是名詞,因此前面用形容詞來修飾。故答案為:harmful。

3句意它們吸收空氣中的有害氣體,產(chǎn)生氧氣供我們呼吸。語境是:產(chǎn)生氧氣供我們呼吸。本題是用動詞不定式做目的,故填:to breathe。

4句意他們是防治空氣污染的主要戰(zhàn)士。根據(jù)are可知此處是名詞復數(shù)。fight是動詞,它的名詞為fighter。故答案為:fighters。

5句意他們是防治空氣污染的主要戰(zhàn)士。此處用名詞污染。pollute的名詞為:pollution。

6句意此外,樹木還可以使我們的生活更加方便。even修飾比較級,convenient的比較級用more。故答案為:more convenient。

7句意事實上,我們從樹上得到更多的東西。此處是副詞作狀語。句子開頭大寫。故填Actually。

8句意大多數(shù)家具都是木制的。由句子Look around this room. Most of ____8____furniture is made of wood.可知本題的家具是指房子內(nèi)的家具,表示特指。故填:the。

9句意所以我們無法想象如果沒有樹木世界會是什么樣子。本題用if引導條件句,表示假設。

10句意如果我們不想要一個沒有樹木的世界,我們必須停下來保護它們。stop to do sth. 停下來去做某事,這里指停止砍伐去保護它們。因此用動詞不定式。故填to protect。

本題是已給單詞的語法填空。此類題主要考查學生對單詞形式變化的掌握程度。單詞形式變化主要有兩種,一是詞的形、數(shù)、式的變化,一是詞的派生變化。在判斷出詞的變化之后還應該進一步審題,看是否需要使用復合的變化形式,這一點是很重要的。

技巧一:名詞形式變化。

名詞的形式變化主要有單數(shù)、復數(shù)、所有格的變化。

技巧二:動詞形式變化。

動詞的形式變化比較多,有謂語的變化(時態(tài)、語態(tài)),有非謂語的變化(不定式、動名詞、現(xiàn)在分詞、過去分詞)。

技巧三:代詞形式變化。

代詞形式變化通常是與人稱變化有關的三大類五小類,即人稱代詞(主格和賓格)、物主代詞(形容詞性和名詞性)、反身代詞。另外還有幾個不定代詞的形式變化,如no one/none、other/another等。

技巧四:形容詞、副詞比較級變化。

英語中大部分形容詞和表方式的副詞都有原級、比較級和最高級的變化。構成比較級和最高級的方式,或通過加后綴—er和—est,或在詞前+more/lessmost/least,且形容詞的最高級還要加the。

技巧五:數(shù)詞形式變化。

數(shù)詞的形式變化包括基數(shù)詞、序數(shù)詞,或加后綴—teen、—ty的變化,甚至還有作分母用的序數(shù)詞的單復數(shù)形式,以及one/two的特殊變化形式 once/twice。

技巧六:詞的派生。

詞的派生現(xiàn)象在英語單詞中是很常見的,派生現(xiàn)象主要發(fā)生在名詞、動詞、形容詞、副詞四種詞中。這種題型還有可能檢測學生對詞根、前后綴、派生詞的掌握。

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