第31题: [单项选择]Questions 11 to18 are based on the conversation you have just heard. A. He enjoys writing home every week. B. He never fails to write home once a week now. C. He doesn’t write home once a week now. D. He has been asked to write home every week. 参考答案:C 答案解析:[听力原文] W:How often do you write home You’ve bought so many stamps and there is only one of them