My mother was looking while I the radio. A. listened toB. have listenedC. was listening to

问题补充：

My mother was looking while I the radio.

A. listened to

B. have listened

C. was listening to

D. is listening to

答案：

A. listened to

B. have listened

(答案→)C. was listening to

D. is listening to

解析：while连词，表示对比译为“然而”，其前后时态保持一致。 句意：妈妈看东西然而我在听收音机。While前用的是过去进行时态故后面也要一致故选C