1.  I had a lot of stereotypes in my mind before I entered the university.

2.  "About how long will it be before I die? "

3.  He was in a over-shirt, and wearing cerulean close-fitting pants, beneath which was a pair of leather shoes, carefully polished before he went out.

4.  Most of us knew that "Cultivation of Ideological Morality" was a course of no importance even before we entered the university.

5.  It was already black before I finished my last class.

6.  Before you start the procedure, don't forget to have a photo taken with the flag of DII to mark this special day.

7.  And forming that kind of expectations or impression before we really know someone can bring impacts on our school life.

8.  Before we went to the restaurant, our leader promised to pay for it.

9.  Before I enter the university, I hold this impression about dormitory supervisors, as well as many people else.

10.  Learn more before you judge is the truth.