Let’s go hiking _____ staying at home, shall we?—A good idea. [ ]
Tens years ago, there _____ full of fish in the lake .Now there are _____ fish .
Boys, you ______ be sitting in this room. It is for your teachers only.
They can draw and they swim.
Bill, is the pink umbrella Anna’s?— No, it _____ be hers. Hers is purple.