题目内容
7．We broke two teeth when playing football．（改为单数句）I broke atooth when playing football．
分析 踢足球的时候我门打掉了两颗牙．
踢足球的时候我打掉了一颗牙．
解答 答案：I，tooth
根据给出的句子We broke two teeth when playing football，把它改为单数句需要把主语we变为单数形式I；复数名词teeth变为单数形式a tooth；故填I，tooth．
点评 该题考查学生对单复数句型的掌握；只要掌握好语法和表达的要领，不难作答．
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