②—I wonder how much you charge for your services. —The first two are free while the third costs $30.

　　③He fell asleep while he was doing his homework.

　　④While there’s life there’s hope.

　　(2)单句改错 The south of the country grows richer，when the north grows poorer.

　　虽然；尽管 而，却 当……的时候 只要 when→while 答案

　　It takes me less than fifteen minutes to wash，get changed，have breakfast，leave home and get on a bus.我用不到15分钟的时间洗刷，换衣服，吃早饭，离开家，然后去坐车。 21. 句型公式　It takes sb. some time to do sth. It takes/took (sb.) some time to do...花了(某人)多少时间做……, 表达“花费”的其他句型：

　　(1)sb.＋spend...on/in doing sth. (2)sth.＋cost sb.... (3)sb.＋pay＋钱＋for sth. (4)sb.＋buy...for＋钱 (1)It took me years to get back on my feet. 我花了好几年才重新找到自己。 (2)It’s going to cost me over $100,000 to buy new trucks. 买几辆新卡车将花掉我10万多美元。 多维训练 选词填空 take，spend，cost，pay，buy (1)I

　　120 on the books. (2)It

　　the boy most of his free time to learn drawing. (3)She

　　￡200 a week for this apartment. (4)Good words

　　nothing，but are worth much. (5)He

　　the bag for ten dollars. spent takes pays cost bought 答案

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