[听力原文]
W: I bought three books for fifteen dollars in this bookstore yesterday.
M: That is very expensive.

How much does each book cost（）

A．It’s not important how he dances.
B．It’s too crowded to dance.
C．If he is careful, no one will notice.
D．No one knows how to dance.

A．Diving (underwater), act of entering water and remaining below the surface to explore, to work, or simply to have fun.
B．Diving (underwater), act of exploring water below the surface.
C．Diving (underwater), act of jumping into the water, the most common form of diving is sport diving, or recreational diving.
D．Diving (underwater), act of going into water and remaining above the surface to explore, to work, or simply to have fun.