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the child of the family. A.nine。 fifthB.nine。 fiveC.ninth。 fiveD.ninth。 fifth【答案】 A 【解析】【分析】句意:我外公家有9個孩子,并且他是第五個孩子。;fifth9;5;;five 9;5;;five 第九;5 ;fifth 第九;第五。根據(jù)第一個空可知,此處填入基數(shù)詞,答案為nine,第二個空填入序數(shù)詞,答案為fifth,故選A。 【點評】考查了基數(shù)詞與序數(shù)詞的辨析,注意,區(qū)分兩者。20.—Dad, about of our classmates wear glasses. —Oh, that39。s terrible. You all should take good care of your eyes. A.three fourthB.third fourthC.third fourthsD.three quarters【答案】 D 【解析】【分析】句意:——爸爸,大約四分之三的同學(xué)戴眼鏡?!?,那真可怕。你們都應(yīng)該好好照顧你們的眼睛。分子用基數(shù)詞,分母用序數(shù)詞,中間用連字符,若分子大于一,分母用復(fù)數(shù)形式。四分之三用three fourths或者three quarters,故選D。 【點評】考查分?jǐn)?shù)表達,注意平時識記。21.There are tourists visiting Beijing every year. A.hundredB.hundredsC.hundreds ofD.two hundreds of【答案】 C 【解析】【分析】句意:每年有數(shù)百的游客參觀北京。表達確切數(shù)字用基數(shù)詞+hundred,表達非確切數(shù)字用hundreds of,前面沒有具體數(shù)字,因此用hundreds of,故選C。 【點評】考查數(shù)學(xué)詞表達,注意平時識記。22. visitors came to take photos of Hongyadong during the vacation. A.ThousandB.Thousand ofC.ThousandsD.Thousands of【答案】 D 【解析】【分析】句意:成千上萬的游客在假期期間來給洪崖洞拍照。橫線后面沒有具體數(shù)字,因此用thousands of,成千上萬的......,故選D。 【點評】考查固定搭配,注意平時識記。23.Li Hua is going to be an elder brother. His parents are planning to have their ________child. A.firstB.secondC.oneD.two【答案】 B 【解析】【分析】句意:李華要當(dāng)哥哥了,他的父母計劃生二胎。A第一,B第二,C一,D二,限定詞+序數(shù)詞+名詞,第幾個......,選項C和D是基數(shù)詞,故排除,根據(jù) Li Hua is going to be an elder brother,可知是二胎,及第二個孩子,故選B。 【點評】考查數(shù)詞,注意根據(jù) Li Hua is going to be an elder brother的語境選擇序數(shù)詞的用法。24.Americans eat vegetables per person today as they did in 1910. A.more than twiceB.as twice as manyC.twice as many asD.more than twice as many【答案】 D 【解析】【分析】句意:美國人現(xiàn)在每個人吃蔬菜的比1910年的兩倍還多。more than twice,表示數(shù)量,放在as … as結(jié)構(gòu)前,是……的兩倍多,故選D。