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三、数词    同学们首先应会读会写所有基数词和序数词，以及与数词有关的钟点表达法。对数词的考查，中考常采用单选题及听力题，这些题型归纳起来，应掌握以下几点特别容易出错的地方。 1.基数词变序数词。其规律为： 1,2,3特殊记，加th从4起 (first,second,third,fourth)  8少t，9去e，千万别忘记 (eighth,ninth)     逢5逢12，ve变f (fifth,twelfth)  20到90，y要变ie (twentieth,ninetieth)    若是几十几，前基后序别倒位 (ninety-first)                          2.hundred,thousand,million 在构成具体的数字时用单数形式。   如：five hundred people. 只有在表达笼统的多数时才加s，构成复数形式。 hundreds of 数以百计的，成百上千的    thousands of 数以千计的，成千上万的 millions of 数百万的  这些词组前不能用具体数字。    3.序数词常与定冠词the 连用。
练习:①Henry has learned eight _________ French words this year.     A.hundred      B.hundreds    C.hundred of     D.hundreds of    ②The _________lesson is the most difficult one in Book Two. (twenty)                另外，同学们还应掌握与数词有关的钟点表达法。    顺读法(钟点＋分钟)       如：4:30 four thirty 4:45 four forty-five     4:15 four fifteen    倒读法(分钟＋to／past＋钟点)      如：4:30 half past four     4:15 fifteen past four／a quarter past four  4:45 fifteen to five／a quarter to five  练习题  :1.At the beginning of the_____(twenty) century,the world's population was about 1700 million.        2.Are these_____(watch)yours? Yes.         3.You don't look well.You'd better go to the______(doctor) at once.               4.Would you give me________,please?  A.two papers    B.two piece of paper    C.two pieces of paper    D.two pieces of papers           5.There are three_____and seven____in the picture.  A.monkeys,sheeps    B.monkeys,sheep   C.monkies,sheep   D.monkies,sheeps               6.A lot of____are talking with two_______.   A.Germans,Frenchmans  B.Germen,Frenchmans  C.German, Frenchmen   D.Germans,Frenchmen        7.June 1 is __.  A.the Children's Day   B.the Childrens' Day  C.Children's Day D.Childrens' Day 8.__________people went out to see what had happened.  A.Thousands of B.Three thousand ofC.Thousand of D.Three thousands           9.We have been in the school for______.  
A.three and a half month          B.three and a half monthsC.three month and a half          D.three months and half           10.__________English is___________ useful language.  A.A, an     B./, a      C.The, an      D. A, /
11.John was given _______ orange bag for his birthday but ______ bag was lost just now.  
A.an,a     B.a,the    C.the,a     D.an,the12.There's ________ old tree near _______ house.   A.a,an   B.an,the   C.a,the   D.the,a 13.There is ________ 800-metre-long road behind _________ hospital.A.an,an     B.a,a  C.an,the   D.a,the