Questions 4 to 7 are based on the following
conversation. At the end of the conversation, you will be given 20 seconds to
answer the questions. Now listen to the
conversation. Which of the following exercises is suggested
A．Wearing arm weights while you are swimming. B．Jogging vigorously in one place for a long time. C．Using bicycles that require you to use both your arms and legs. D．Walking slowly while swinging your arms back and forth.