Do you think there is somebody in the room?

问题描述:

Do you think there is somebody in the room?
No,I _____ carefully,but didn`t _____ anything.
A.listened hearB.listened listen to
C.heard listen toD.heard hear

正确答案:A Listened 指听的动作
Hear 指结果,同时助动词后面要用动词原形