M: How big is your research group Alice? ,F: Well, there were 6 of us to begin with, then 2 people left.
(A) M: So your research group has only two members,then you should be busy. (B) M: Now your research group totally has six people, right? (C) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (D) M: Your research group is the same size as ours, we both have four members.
D