A、$20to $50. B、$200to $500. C、$2000to $5000. D、$10to $100. B本题考数字，在听到数字时一定要敏感。对话中提到$20to$50 for each，那么10所学校即为$200 to $500，故选B。

W: Hi, Jack.
M: Hi, Jean. I was just looking for you.
W: What’s up?
M: Which semester should I apply for the schools?
W: Usually, American schools start in the fall, about the end of August.  You can apply for the spring semester as well, but your chance of getting financial aids is lower.
M: For the fall semester, when should I send the application materials?
W: All the application materials should arrive at the schools before the end of February to make sure you get full attention. You’d better start early since it takes 10 days for letters to get there.
M: I got the forms for taking TOEFL and GRE. When do you think I should take them?
W: It takes a month for the score to get to schools, so you’d better take them before the end of this year if you apply for the fall of next year.
M: I’m going to apply for ten schools. It will cost me a fortune to send the scores to every school.
W: Tell me about it! Plus the application fees, $ 20 to $ 50 for each school. Good luck!
M: I have my fingers crossed.
W: Right. Hope for the best. Prepare for the worst.