: Listening to a short passage and choose the best answer to each question you hear. A:55-to 64-year-olds. B:35-to 44-year-olds. C:18-to 24-year-olds. D:45-to 54-year-olds. 答案: 55-to 64-year-olds. 3、
: Listening to a short passage and choose the best answer to each question you hear. A:55-to 64-year-olds. B:35-to 44-year-olds. C:18-to 24-year-olds. D:45-to 54-year-olds. 答案: 55-to 64-year-olds. 3、