1、She must be running to catch the bus.
She must be running ___ ___ ___catch the bus.
2、My father used to be fat.
In the ___ my father ___fat.
3、My parents are very worried if I come home late.
My parents are ___ worried if I come ___late.
4、There might be something visiting the homes in our neighborhood.
There might be something ___ ___ the homes in our neiguborhood.