用所给词的适当形式填空。
Mum ______________(mop) up the floor when I got home.
We should prevent him _______________ (cut) down the old tree.
The doctor did what he could ______________(save ) the old man.
It’s ______________(possible) for us to walk 1,000 kilometres in 3 minutes.
He walked quietly in order ______________(not wake) up the sleeping baby.
Which city is ______________(beautiful), Helen, Beijing or Shanghai? Shanghai.
In my eyes, those people are ______________(hero).
The story ______________(it) is very interesting. You’ll like it.
Mr Li is such a_______________ (humour) teacher that his students love him very much.
The earthquake happened and many people were ______________( terrible ) hurt.