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形容詞large或big,因此是twice as large as,故選B。 【點(diǎn)評(píng)】考查倍數(shù)的表達(dá)方式。25.of the land in that district covered with trees and grass. A.Two fifths。 isB.Two fifth。 areC.Two fifth。 isD.Two fifths。 are【答案】 A 【解析】【分析】句意:在那片區(qū)域五分之二的土地被樹(shù)和草覆蓋著。分?jǐn)?shù)由基數(shù)詞和序數(shù)詞構(gòu)成,分子用基數(shù)詞,分母用序數(shù)詞,分子大于1時(shí),分母用復(fù)數(shù),所以五分之二的表達(dá)為two fifths。且land 作為集體名詞是不可數(shù)名詞,謂語(yǔ)應(yīng)用單數(shù)形式,所以用is,故選A。 【點(diǎn)評(píng)】考查分?jǐn)?shù)的表達(dá)和be動(dòng)詞用法。注意分?jǐn)?shù)的表達(dá),分?jǐn)?shù)由基數(shù)詞和序數(shù)詞構(gòu)成,分子用基數(shù)詞,分母用序數(shù)詞,分子大于1時(shí),分母用復(fù)數(shù)。26.About of the students in our class were born in the . A.two thirds。 2000sB.two threes。 2000sC.two third。 2000D.two thirds。 2000【答案】 A 【解析】【分析】句意:我們班大約三分之二的學(xué)生出生在21世紀(jì)。分?jǐn)?shù)的表達(dá):分?jǐn)?shù)由基數(shù)詞和序數(shù)詞構(gòu)成,分子用基數(shù)詞,分母用序數(shù)詞,分子大于1時(shí),分母用復(fù)數(shù),因此三分之二的英文是 two thirds;in the 2000s,表示21世紀(jì),故選A。 【點(diǎn)評(píng)】考查分?jǐn)?shù)的表達(dá)和時(shí)間表達(dá)。注意分?jǐn)?shù)由基數(shù)詞和序數(shù)詞構(gòu)成,分子用基數(shù)詞,分母用序數(shù)詞,分子大于1時(shí),分母用復(fù)數(shù)。27.Having introduced the new equipment, our factory turned out in 2004 as the year before. A.cars three times as many asB.three times as many carsC.as many cars as three rimesD.three times more cars than【答案】 B 【解析】【分析】句意:在引進(jìn)新設(shè)備后.我們的工廠(chǎng)在2004年的產(chǎn)量是前一年的三倍。倍數(shù)+as+形容詞+as+,……是……倍,固定搭配,故選B。 【點(diǎn)評(píng)】考查倍數(shù)的表達(dá),注意倍數(shù)+as+形容詞+as的用法。28.—Hurry up! The train will arrive at 8 o39。clock. —Don39。t worry! There39。s still _________ minutes left. It39。s just 7:40.A.twelfthB.twelveC.twentyD.thirty【答案】 C 【解析】【分析】句意:——快點(diǎn)!火車(chē)將在8點(diǎn)鐘到達(dá)?!挥弥?!還有20分鐘。才7點(diǎn)40。A第十二;B十二;C二十;D三十,根據(jù)It39。s just 7:,故選C。 【點(diǎn)評(píng)】考查數(shù)詞,準(zhǔn)確掌握數(shù)詞的寫(xiě)法。29.Alibaba CEO Jack Ma has decided to retire from his pany in his _________. A.fiftyB.fiftiesC.fiftiethD.fiftieths【答案】 B 【解析】【分析】句意:阿里巴巴的總裁馬云已經(jīng)決定在他50多歲從他的公司退休。in one39。s +基數(shù)詞復(fù)數(shù),在某人幾十多歲時(shí),in one39。s fifties,在某人五十多歲時(shí),故選B。 【點(diǎn)評(píng)】此題考查數(shù)詞。注意固定短語(yǔ),in one39。s fifties。30.Most of the doctors in this hospital were born ________, and they are ________now. A.in the 1970。 in their fiftiesB.in 1970s。 in the fiftiethC.in the 1970s。 in fiftiethD.in the 1970s。 in their fifties【答案】 D 【解析】【分析】句意: 這家醫(yī)院的大多數(shù)醫(yī)生都出生于20世紀(jì)70年代,現(xiàn)在他們都是50多歲。in the+四位數(shù)的整數(shù)復(fù)數(shù)形式,在……世紀(jì)……年代,in one39。s+兩位數(shù)的整數(shù)復(fù)數(shù)形式,在某人多大歲數(shù)時(shí) , 故選D。 【點(diǎn)評(píng)】考查數(shù)詞,注意表示世紀(jì)和年齡的用法。