b. The university is proud not only of its beautiful campus but also of its strong teaching staff.
=> proud not only of A, but also proud of B.
a. The audiences didn't only understand his production of Shakespeare's
The Merchjant of Venice but also appreciate it.
=> *didn't only; ... not only did the audience understand ..., they also appreciated it.
b. The audiences understood not only his production of Shakespeare's
The Merchjant of Venice but also appreciated it.
=> the audience not only understood ..., they also appreciated it.
a deep concern for our people
Can I use about? It expresses a different meaning.
Can I use over?
a. It's unreasonable for the teacher to ask the students to learn all the texts by heart.
=> For the teacher to ask the students to learn all the texts by heart is unreasonable.
b. The film crew has been waiting several days for the weather to clear up.
=> waiting for something to happen.
He is a friend of my father's. (This means my father might have one or more friends. Is that right?)
=> It means he is your father's friend. There's no meaning there that your father has more than one friend.
He is a friend of my father. (This lays stress on identity. He is my father's friend not his teacher or colleague etc. Is that right?)
=> Right. Note, however, that some speakers use of my father to mean of my father's.
Student or Learner