单项选择题


You will hear three dialogues or monologues. Before listening to each one, you will have time to read the questions related to it. While listening, answer each question by choosing A, B, C or D. After listening, you will have time to read your answers. You will hear each piece once only.
Questions 11-13 are based on the following talk. You now have 15 seconds to read Questions 11-13.
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 swing your arms back and forth.