--- Did he notice you enter the room? --- I don’t think so. He to the radio with his eyes

问题补充：

--- 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

答案：

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”。