一Did he notice you enter the classroom? 一I don’t think soHe to the radio with his eyes s

问题补充：

一Did he notice you enter the classroom?、

一I don’t think so．He to the radio with his eyes shut·

A. 1istened

B. was listening

C. has listened

D. had listened

答案：

A. 1istened

(答案→)B. was listening

C. has listened

D. had listened

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