第30题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard.A) He wants to quit the class too. C) He made great efforts in learning to swim. B) He knows nothing about swimming. D) He teaches swimming. 参考答案:C 答案解析:[听力原文] W: I’m thinking about dropping my swimming class, I’m just not catching on. M: Hold on