第三课时Section B（1a1e）当堂训练.根据方框中所给的图片提示，在句中的空缺处填入正确的价格。1.Those socks are_ .2.The shorts are only _.3.Lucys hat is big. Its _.4.Her T-shirt is red. Its at a very good priceonly_ .5.For boys, you can buy sweaters. They are_ .用方框中所给单词的适当形式填空。much, thirteen ,are, sock, it6.These shorts are _ dollars.7.How much are those pants?_ are 18 dollars.8.My black pen _ 2 yuan.9.How _ sisters do you have?Only one.来源:gkstk.Com10.Where are my _?They are on the bed.单项选择。( )11.Can I help you?_.I want a hat.A.Youre welcome B.Yes,you canC.Yes,please D.No,you cant来源:学优高考网( )12.Whats 55 in English?Its_.A.fifty-five B.fifty and five C.fifty five D.fivety-five( )13.Your skirt is nice._.A.Yes,it is B.Here you are C.Thank you D.Here it is( )14._is the sweater?Yellow.A.How much B.What C.How D.What color( )15.How much_the T-shirt?_28 dollars.A.does;It B.are;Are C.are;Theyre D.is;Its.句型转换,每空一词。16.Can I help you?(改为同义句)_can I _ for you?17.Lisas shoes are yellow.(对画线部分提问)_ _are Lisas shoes?18.The white pants are 88 yuan.(对画线部分提问)_ _are the white pants?19.This sweater is ￥60.(改为复数句)_ _ _￥60.20.She wants a black bag.(改为一般疑问句) _she _ a black bag?名校讲坛基数词的用法(一)基数词的定义表示数量的数词叫做基数词。例如：one, two, three, thirteen, twenty等。(二)基数词的基本表达法1.112的基数词在拼写时需个别注意，应分别记忆。2.1319表示“十几”的词，往往是在个位数后加-teen，单词有两个重音，对thirteen, fifteen和eighteen需特殊记忆。3.2090整十的基数词，要在末尾加-ty，但有些词应注意其拼写。2090的整十的基数词为：来源:gkstk.Com20twenty30thirty40forty50fifty60sixty70seventy来源:学优高考网80eighty90ninety4.2129直到9199表示“几十几”的词，中间用连字符把十位数和个位连起来。例如：21twenty-one25twenty-five31thirty-one56fifty-six58fifty-eight89eighty-nine5.基数词只能修饰可数名词。例如：one flower 1朵花one hundred trees 100棵树fifty-six boys 56个男孩来源:学优高考网gkstk6.百位或百位以上的数，通常在百位和十位或百位和个位之间用and连接，十位和个位之间用连字符。例如：156one hundred and fifty-six506five hundred and six(三)基数词作主语时谓语动词用单数形式。第三课时Section B（1a1e）.1.five dollars2.eighteen yuan3.thirty yuan4.twenty dollars5.thirty-five yuan.6.thirteen7.They8.is9.many10.socks.11-15CACDD.16.What;do17.What color18.How much19.These sweaters are20.Does;want