Mr. Smith didn’t understand _____ made his son so upset that evening.

We do our best to be careful and prevent bad things from happening，but most of us will________find ourselves in a situation where we or someone else needs help[ ]

The man has so much ________that he can do the work of five ordinary people.

This term I want to be the topstudent in my class.—– _________.

_________ you are a big boy, you must behave better