2级
单选题The phrase "people in this age group" underlined in Paragraph 2 refers to _______________.
参考答案：B进入在线模考
[分析]词义题型
见第二段中One exception is found among people in their twenties，especially women，who show a rise in cold infections，because people in this age group are most likely to have young children．根据句子结构分析，“people in this age group”指的就是前面提到的people in their twenties；因此B为答案。
见第二段中One exception is found among people in their twenties，especially women，who show a rise in cold infections，because people in this age group are most likely to have young children．根据句子结构分析，“people in this age group”指的就是前面提到的people in their twenties；因此B为答案。
