(单选题)

The author’s roommate offered to help him because ______.

A.he felt sorry for the author

B.he thought it was a chance to make some money

C.he knew the doctor was a very good one

D. he wanted the author to have a good lawyer

参考答案：B

参考解析：

细节理解题。根据第一段第五句和第六句“But the next day, he asked me to pay him $200 for what he had done. I was astonished.”可知“我”的室友帮我叫了医生，但第二天，他要求“我”为他所做的事付给他200美元。所以室友帮作者，这是为了挣钱，所以B项正确，A、C、D项文中没有提及到，所以排除，故选B。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语