While I to the programs my mother outside.A. listened; was washingB. was listening; washe

问题补充：

While I to the programs, my mother outside.

A. listened; was washing

B. was listening; washed

C. was listening; was washing

D. was listening; is washing

答案：

A. listened; was washing

B. was listening; washed

(答案→)C. was listening; was washing

D. was listening; is washing

解析：句意：当我正在听节目时，妈妈正在外面洗东西。while 后跟过去进行时，when 后跟过去时，两个动作同时进行，故选C。