what you when your mother came back?

what you when your mother came back? －what were you doing when your father came back? what were you doing when your father （came） back? 完成对话.A:What __________ your mother ___________ when you came What < >you < > when your mother rang you up? When he came back,what are you doing 为什么用when what's your mobil member?when will you be back? what()you(do)when your father comes back I heard you singing in your room when I came back分析句子成分 i _____my homework when my mother came back home. Tom pretended _____ when his mother came back. _____ you _____(write) a letter when your mother came in ?