Thinking      you know        in fact you don’t know is a terrible mistake.

.We need to strike a ______ between the needs of the country and the rights of the individual(个人). 

John Smith, a successful businessman, has a ______car. 

I will never forget the day _______ I came to my university and the day ______  I spent in a new city. 

— What can I do for you, sir?— I want _____.