Tom says there is something in the room.Jack _____carefully,but he ______nothing.

问题描述:

Tom says there is something in the room.Jack _____carefully,but he ______nothing.
A.listens;listens
B.listens to;hears
C.listens;hears
D.hears;listen to 急.

B.listens to; hears
tom说屋子里有动静,jack 注意的听,但什么也没听到.