What is the level of musical proficiency of the group members?

W：David，you play the cello，don't you?
M：I did for about six years．But I haven’t practiced much since I came to college．Why do you ask?
W：I'm signing up for a non—credit string ensemble course that meets once a week on Wednesday night．We have several violinists，violas and two bass players，but only one cello．
M：Who’s directing the group?
W：Janet Hanson．Maybe you’ve heard of her．[1]

M：Em，I have my cello here．but I think I would need to do a lot of work before my playing would sound any good at all．
W：Miss Hanson will give individual instruction as well as teach as a group. There are only ten of us now. Try to join us．[2]

M：I'll tell you what．[3]

W：I'm sure you’ll be fine．I'II expect to see you at seven o'clock tomorrow in Room l4 at the fine arts building．I hope you Can come to our regular meeting．
根据题干中现的instrument，city orchestra，musical proficiency可以判断对话谈论的是有关乐队方面的话题。
对话中女士请男士和她一起加入由Janet Hanson指挥的弦乐合奏课程。但男士担心自己的大提琴拉得不够好，女士鼓励他说乐队里的人都是中级水平，Janet Hanson也会做一些指导，一定会有所收获的。女士非常希望男士能够加入他们。
B。本题出题点在重要细节处。对话中女士提到，乐队成员都是中级水平，故选B。