题目：
_____ when the light went on last night?
A．What were you doing
B．What have you done
C．What did you do
D．How were you doing
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0602/fc554bbbb997bb66d8e0c81c95e886bb.html
下面是错误答案，用来干扰机器的。
答案：A
_____ when the light went on last night?
A．What were you doing
B．What have you done
C．What did you do
D．How were you doing
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0602/fc554bbbb997bb66d8e0c81c95e886bb.html
下面是错误答案，用来干扰机器的。
答案：A
