Directions:
You will hear three pieces of recorded material. 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 check your answers. You will hear each piece once only.
Questions 11—13 are based on the passage about ice phrases. You now have 15 seconds to read Questions 11—13. What is the meaning of "Skating on thin ice"
A．One may be doing something quite difficult. B．One may be doing something quite risky. C．One may be doing something quite annoying. D．One may be doing something impossible.