Unit新概念英语青少版1B.pptx

Whatasurprise!;/l/;Letswrite;one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve;thirteen,fourteen,fifteen,sixteenseventeen,eighteen,nineteen;twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety;50;60;30;20;40;70;80;90;twenty-one,twenty-two,twenty-three,twen