Unit 17 You must be more careful!

　　What row are you in？你在第几排？

　　3）turn名词，意思是“顺序，次序”。例如：

　　They came into the classroom in turn.他们依次走进了教室。

　　It’s your turn to speak.轮到你发言了。

　　2. Everyone laughed at the woman’s mistake．每个人都因为那妇女的错误而笑了起来。

　　1）laugh at意思是“嘲笑，因……而笑”。例如：

　　Don’t laugh at him. 别嘲笑他。

　　We all laughed at Li Lei when he was late for school again. 当李雷又一次迟到时，我们都笑了。

　　2) mistake是个可数名词。常见的词组有：make a mistake/ make mistakes, 例如：

　　I made a few mistakes in my exercise-book. 我在练习本上出了几个错。

　　Everyone may make a mistake. 人人都可能会犯错。

　　3. Mr. Smile said he did not want to quarrel with the policeman. 斯迈尔先生说他不想与客家争吵。

　　quarrel with意思是“与……争吵”，后面接表示人的名词。quarrel about意思是“为……而争吵”，后面接争吵的内容。“因某事与某人争吵”可写成quarrel about sth. with sb. 或者quarrel with sb．about sth.。例如：

　　I don’t want to quarrel with Jim.我不想和吉姆吵架。

　　They are quarrelling about a maths problem. 他们在为一道数学题争吵。

　　I quarreled about journey with Tom yesterday．
　　= I quarreled with Tom about journey yesterday．昨天我与汤姆就旅游的事吵了一番。

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