【单选题】听力原文:M: I just found out that my parents are moving. W: Mmmm. Are you surprised? M. Well, not really. They've been trying to sell their house for six months to a year now. W: Oh, well, I thought they ...
A.
His parents are retiring very soon.
B.
His parents don't like living in this city.
C.
His parents have implicitly indicated their future plans several times.
D.
His parents have been trying to sell their houses for some time.