单项选择题


You are going to hear four conversations. Before listening to each conversation, you will have 5 seconds to read each of the questions which accompany it. After listening, you will have time to answer each question by choosing A, B, C or D.
Questions 11-13 are based on a conversation you are going to hear.
What is the main topic of the conversation

A.How to select a good umbrella.
B.How to treat minor aches and pains.
C.How to sharpen the senses.
D.How to predict the weather.