8．their　考查物主代词。their代替the twins'，作parents的定语。

　　9．educational　考查形容词。设空处后为名词，由此可判断设空处应用形容词作定语修饰opportunities。

　　10．who　考查定语从句。先行词为well­to­do parents，关系词在定语从句中作主语且指“人”，故填who。

　　Ⅳ.短文改错

　　假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误仅涉及一个单词的增加、删除或修改。增加：在缺词处加一个漏字符号()，并在其下面写出该加的词。删除：把多余的词用()划掉。

　　修改：在错的词下画一横线，并在该词下面写出修改后的词。

　　注意：1.每处错误及其修改均仅限一词；

　　2．只允许修改10处，多者(从第11处起)不计分。

　　Echo, my favorite teacher, is a pretty and slim lady. When she talks to us, she always has a smile on his face. I think Echo is gifted teacher because she has a lot of good teach methods. Her classes are so full of funs that you will never feel bored. To improve our grades, she usually gave us some advice on how to learn English well .What's more, she spends much her time helping her students instead of staying with her family. Sometimes, she hardly has any time to have the lunch. Whenever I ask her questions, she will spare no effort to make me understood, with patience or care. I have never seen so a good teacher as her before.

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