题目内容
4．My brother wants to be anengineer （工程师） when he grows up．分析 我的哥哥想长大了成为一名工程师．
解答 答案：engineer．
根据提示汉语结合语境推测句意是"我的哥哥想长大了成为一名工程师．"，根据设空处前面的an判断填名词单数形式，"工程师"的英文是engineer，所以答案是：engineer
点评 做这类题型，首先根据所给汉语明确句子所要考查的单词或短语的拼写，再结合相关语法知识对单词或短语做出形式上的变化．
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