2.(he   ill   hero   exercise    tooth)
71.The baby is very young.He has noteeth now.
72.Yang Liwei is one of theheroesin my heart.
73.Smoking can bring us many kinds ofillnesses
74.He spends two hoursexercising every day.
75.He did his homework all byhimself yesterday.

分析 71.這個小孩很小,他沒有牙齒.
72.楊利偉是我心中的英雄之一.
73.吸煙能夠給我們帶來很多種疾。
74.他每天花兩個小時鍛煉.
75.昨天他全憑自己做的作業(yè).

解答 71.teeth.考查名詞復數(shù).從語法上看,所填單詞為動詞had的賓語,應為名詞.根據(jù)英語提示,特別是"The baby is very young"(嬰兒很小)和"has"(長),確定選用tooth的某種形式.tooth為名詞,意思是"牙齒";其復數(shù)為teeth.no teeth=not any teeth(沒有牙齒).(no=not a 或者not any.)故填teeth.
72.heroes考查名詞復數(shù).從語法上看,所填單詞在"one of"結構中,應為名詞復數(shù)形式."one of+可數(shù)名詞復數(shù)"結構表示"其中之一".根據(jù)英語提示,特別是"Yang Liwei"(楊利偉),確定選用hero.hero為名詞,意思是"英雄";其復數(shù)為heroes.one of the heroes其中的一個英雄.故填heroes.
73.illnesses.考查名詞復數(shù).從語法上看,所填單詞在many kinds of 后面,作為介詞的賓語,應為名詞的復數(shù)形式."many kinds of+名詞(復數(shù))"表示許多種類的東西.根據(jù)英語提示,特別是"Smoking"(吸煙)和"bring"(帶來),確定選用ill的某種形式.ill為形容詞,意思是"生病的";其名詞形式為illness,意思是"疾病",它是不可數(shù)名詞;但當指多種多樣的疾病時,要使用其復數(shù)形式illnesses(即,不可數(shù)名詞的復數(shù)形式表示多種多樣,或者不同種類):many kinds of  illnesses 多種疾。侍 illnesses.
74.exercising.考查動名詞及spend (in) doing sth句型.從語法上看,本句為spend (in) doing sth句型,故填動名詞.根據(jù)英語提示,特別是"spends two hours"(花兩小時)和"every day"(每天),確定選用exercise.exercise作為動詞,意思是"鍛煉,訓練,練習";其動名詞為exercising.spend (in) doing sth花費時間做某事;spend two hours exercising花兩小時鍛煉.故填exercising.
75.himself.考查反身代詞及短語by oneself.從語法上看,所填單詞被介詞by所修飾,作為其賓語,并共同構成狀語.根據(jù)英語提示,特別是"He did his homework"(他做作業(yè))和"all by",確定選用he的某種形式.he為人稱代詞主格,意思是"他";其賓格為him;反身代詞為himself.him和himself都可作介詞by的賓語.但by him一般是用在被動語態(tài)中,本句不是被動語態(tài).(all) by oneself獨立地; 單獨地;全靠自己;(all)by himself(全靠)他自己;他獨自地.故填himself.

點評 首先要掌握句子的意思,然后結合具體的題目以及給出的英語單詞提示,就可以確定正確答案.

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