----Have you known Professor Jackson in our department for a long time ? ----Yes, since he _____ the our university.
I’m pleased ______ should be done has already been done.
Do you know our town at all? No, this is the first time I ______ here.
More than one hundred got saved from the fire _____ helicopter.
You didn’t let me drive. If we _____ in turn, you ______ so tired.
So loudly ______ that every one of the class could hear him.