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十二個月。twelfth, ninthtwelve, ninethtwelve, ninths forties的用法。根據(jù)短語in their forties,在四十多歲,可知比較符合句意,故選A。D.C.B.18.—Have you heard of the TwoChild policy? —Of course. And I know many couples have new babies in their ______.A.thousands of,幾千,join sb,加入,和某人一起,故選A。s go and____________ them., join, be a member of thousand, take part in, be in【答案】A 【解析】【分析】句意:——2020年奧運會將需要幾千名志愿者。 【點評】考查數(shù)學(xué)詞表達(dá),注意平時識記。表示確切數(shù)字時用基數(shù)詞+thousand,表示非確切數(shù)字時用thousands of。D.C.B.16.There are about two ________ students in the newly built school. A.two,2,是基數(shù)詞,所以用million,故選A。millions of【答案】 A 【解析】【分析】句意:保險公司付給李先生兩百萬美元為了他被偷來的花瓶。C.millions15.The insurance pany paid Mr Li two___________ dollars for his stolen vase. A.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。 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。D. Two thirds Two thirdC.B.thousand。注意識記名詞sixteenyearolds。結(jié)合句意,故答案為C。Sixteen year olds【答案】 C 【解析】【分析】句意:16歲的青少年不允許開車。C.Sixteen years old should not be allowed to drive. A.注意基數(shù)詞和序數(shù)詞的使用規(guī)則?;鶖?shù)詞放在名詞前修飾名詞,表示數(shù)量,因此用five;序數(shù)詞放在floor前面表示順序,因此用ninth,故選C。 ninth【答案】 C 【解析】【分析】句意:在戴爾的家里有五個人。D. ninthC. nineB. nine floor. A.people in Dale39。 【點評】考查數(shù)學(xué)詞表達(dá),注意平時識記幾百幾十幾的表達(dá)。表示數(shù)量246時,百位與十位之間要用and連接,且hundred被具體數(shù)字修飾時,用單數(shù)形式。C.two hundreds and fortybooks. A.11.—How handy books are there on the shelf? —Well. I think there are 【點評】考查數(shù)詞用法。second【答案】 D 【解析】【分析】句意:——你好,泰德!上個月去黃色的旅行怎么樣呢?——好極了!我盼望這能再去一次。C.first10.—Hi, Ted! How was your trip to Mount Huangshan last month? —Fantastic! I am expecting to go there for a _____ time. A. 【點評】考查序數(shù)詞辨析??崭袂坝卸ü谠~the與可數(shù)名詞單數(shù)month,要用序數(shù)詞。谷物雨通常在一年中的四月開始。C.B.9.There are 24 solar terms in a year. Grain Rain often starts in April, the ________ month of the year. A.表示分?jǐn)?shù)時分母用序數(shù)詞,分子用基數(shù)詞,分子大于1時,分母用復(fù)數(shù),四是分子,所以用基數(shù)詞four,5是分母,用序數(shù)詞,分子大于一,所以用復(fù)數(shù)fifths,所以五分之四用fourfifths,故選C。 fourfive【答案】