题目内容
6．The Summer courses in Los Angeles usuallylast（持续） for four weeks．分析 洛杉矶的暑假培训课程通常持续四个星期．
解答 答案：last．
根据所给汉语提示结合语境推测句意是"洛杉矶的暑假培训课程通常持续四个星期．"，此处根据句子表述的是经常性的行为判断用一般现在时，主语是复数名词，所以填动词原形，"持续"的英文单词是last，所以答案是：last
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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