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

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：当时他在听收音机。