用所给的时间状语从句改写句子.
问题描述：
用所给的时间状语从句改写句子.
1.What is he doing?（when his parents came back）
2.Who are you talking to?(when I called you last night)
3.It is rainning heavily outside.(when I woke up）
4.Is your father sleeping?(when the telephone rang）
5.I'm looking out of the window.（when the teacher asked me a question）
答
1.What was he doing when his parents came back?2.Who were you talking to when I called you last night?3.It was rainning heavily outside when I woke up.4.Was your father sleeping when the telephone ran...