网上可以搜到这道题,解答者甚多,多为胡言乱语。按照现在的这个句子,四个选项都是错误的。如果过去分词为正确选项,则flint一定是输入错误,改为first。即 When first introduced to the market, these products...。when从句的主语和主句主语相同,从句含有动词be,从句省略主语+be。即从句等于 When they were first introduced to the market, these products enjoyed great success.
如果觉得我的回答对您有用,请随意打赏。你的支持将鼓励我继续创作!