每空一个词,使句意相同
问题描述：
每空一个词,使句意相同
Mum was cleaning the floor when I left the house.
The floor___ ___ ___by Mum when I left the house.
答
was being cleaned
每空一个词,使句意相同
Mum was cleaning the floor when I left the house.
The floor___ ___ ___by Mum when I left the house.
was being cleaned