当彼得的妈妈回到家时，彼得正在做他的家庭作业吗？ ？

Wass Peter doing his homework when his mother arrived home?

youdao

当彼得的妈妈回到家时，彼得正在做他的家庭作业吗？ ？

Wass Peter doing his homework when his mother arrived home?

youdao