单项选择题


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.
Why was the man late for the opera

A.Because he was knocked down by the car and was seriously injured.
B.Because he was too busy to remember the exact time of the opera.
C.Because he had to comfort his sister whose boyfriend was badly injured.
D.Because he was struck in the traffic jam and could hardly move forward.