People who listen to loud music can damage their ears.

[curtisy]

I recently encountered a problem when I was studying relative clauses because I didn't quite understand how to return such sentences to the original ones.

For example, People who listen to loud music can damage their ears.
Also, Students who study hard can get high score in the exam.

Some grammar books give examples of this when explaining relative clauses:

There is the doctor.​

I met him yesterday.​

= There is the doctor who I met yesterday.​

But I don't know how to separate the two examples above.

 

[Barque]

People who listen to loud music can damage their ears.

There are some people who listen to loud music/music at a high volume. They can damage their ears.

Students who study hard can get a high score in the exam.

Some students study hard. They can/will do well in the exam.

 

[Tarheel]

In American English it's on the exam.

 

[Amigos4]

It's a cultural thing. US uses 'on the exam', India uses 'in the exam'.

 

[emsr2d2]

BrE uses both. The following two sentences are natural and common:

How did you do on your exams?
How did you do in your exams?