It is __________ for us to do exercises regularly. It is good for our health.A. tiring B. necessary C. the worst
It is such that you muston it.
Middle school students _________ smoke because it is bad for their health.
The old book there ______ some strange pictures in it. Nobody can understand them.
--- Did you go to Jack’s party last night? ---- No, I ______.
Have you seen a tall boy ______ a basketball ______into the building?