More than twenty years____________since he came to teach in this school, and every student and every parent_____him

Is this school ______you studied in three years ago?

universally believed that a student with an extremely ________ mind usually gets high scores in the exams, especially in the physics exam.

The two girls are so alike that strangers find_______difficult to tell one from the other. [ ]

Can I help you—Yes, please. I would like ________.