Unit7 How much are these socks?单元词句梳理Section B（1a-1e）必背单词 1.ten num.十2.eleven num.十一3.twelve num.十二4.thirteen num.十三5.fifteen num.十五6.eighteen num.十八7.twenty num.二十8.thirty num.三十必背句子 9._它多少钱？How much is it?
