и,а,но -это предлоги?

I. Complete each sentence with one of the words below. One word is odd out.

private punishment depressed secondary education allowed argument

argue trouble compulsory behaved

Students are … to talk freely about their problems.

I'm frightened of getting into … , but it's not true.

The education in … schools is very expensive.

Public schools are famous not only for their perfect … .

Each teacher reports if you have … well or badly.

In Russian schools there are several types of … like in British schools.

Martin is … because he can't speak to the girl he really likes.

It's a strong … .

You shouldn't … with your parents.

At … school pupils study for five years.