--- Did he notice you enter the room?
--- I don’t think so. He to the radio with his eyes shut.
A. listened
B. was listening
C. has listened
D. had listened
网友回答
A. listened
(答案→)B. was listening
C. has listened
D. had listened
解析：He to the radio with his eyes shut.后省略了when I entered the room。此处意为“（当我进入那个房间时，）他正闭着眼睛听收音机”。