Ⅰ.阅读理解(共15小题；每小题2分，满分30分)
阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
A
Enter a typical high school，and the first thing you see is the front office，where the principal dwells and grades are stored.The front office also reinforces familiar hierarchy：principal at the top，teachers in the middle，kids on the bottom，sitting with hands folded at their desks.
