问题：
【题文】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
【题文】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 |
参考答案：