问题: 一道单项填空
She was complaining that the doctor was _____too much for the treatment he was giving her.
A.wasting B.offering C.costing D.charging
答案为D，为什么？
解答:
sb. waste sometime/some money doing sth.是sb.浪费时间或钱
sth. cost sb. some money to do sth. 某物花费
sb. charge some money for sth. 某人要价．．．为了sth.
用法各不相同，主语搭配也不同，
offer 意思不对，
所以选Ｄ
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