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可知七月是一年中第七個(gè)月,所以用序數(shù)詞seventh,故選C。 【點(diǎn)評(píng)】考查數(shù)詞用法,注意平時(shí)識(shí)記,理解句意。13.We are proud of our country. The year 2019 is her ____ birthday. A.seventyB.the seventyC.the seventiethD.seventieth【答案】 D 【解析】【分析】句意:我們?yōu)槲覀兊膰?guó)家感到驕傲。2019年是她的70歲誕辰。表示幾歲的生日,要用序數(shù)詞,因此排除A、B;又因前面有物主代詞her,因此不用加定冠詞,故選D。 【點(diǎn)評(píng)】考查序數(shù)詞的基本用法。14.The number of the students in our school is about four __________. _______ of them are girls.A.thousand。 Two thirdsB.thousands。 Two thirdC.thousands。 Two thirdsD.thousand。 Two third【答案】 A 【解析】【分析】句意: 我們學(xué)校的學(xué)生人數(shù)大約是四人。三分之二是女孩。four基數(shù)詞后用thousand的原形,分?jǐn)?shù)表達(dá)形式是分子是基數(shù)詞,分母是序數(shù)詞,分子大于一,分母用復(fù)數(shù)形式,故三分之二是two thirds , 故選A。 【點(diǎn)評(píng)】考查數(shù)詞,注意分?jǐn)?shù)的用法。15.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。16.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。17.It39。s the ______ time for me to visit the Shunfeng Park. And I want to visit it a sixth time. A.fifthB.fiveC.fifthsD.the five【答案】 A 【解析】【分析】句意:這是我第五次參觀順豐公園,我想第六次去參觀。A序數(shù)詞,第五,B基數(shù)詞,五,根據(jù)the定冠詞可知,定冠詞后是序數(shù)詞,故選A?!军c(diǎn)評(píng)】考查數(shù)詞,注意定冠詞后是序數(shù)詞的用法。18.September is the _____month of a year. A.seventhB.eighthC.ninth16