Most of the students got a favourable impression________the new teacher，and they were especially impressed________his humour and broad knowledge

You must notice ____ the emergency exit is when youenter the building．

It’s too hot. Would you mind _________ the door—— _________. Please do it now.

I’m going to Shhow to doit.

When the waiter saw the man in rags coming into therestaurant, he looked down upon him but hadto offer some service to him.[ ]