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。