【2015·天津】Jane can’t attend the meeting at 3 o’clock this afternoon because she ______ a class at that time.
Jim is ___ person, and everyone is willing to be ______ with him.
They kept trying _________ they must have known it was hopeless.
There are five pairs _______, but I'm at a loss which to buy.
It's ___ so easy as you imagine.
______ going to the exhibition.