Punctuation

[greenhouse]

Could someone help me to put commas in the right place of the following sentences? Thank you.

We must stand up for our rights today, or we may find ourselves with no rights at all.

These students do not respect the feeling of others, but they seem to respect themselves.

The administration promises to improve dining hall service, so the quality of the food may actually improve this year.

Yet trash cans have been placed all over campus, students still throw garbage on the ground.

Some students are late for their class, because they have to park far from their classroom.

Some students stay on the sidewalks, and some students cut across the grass.

[Rover_KE]

You appear to be asking us to check your homework before your teacher sees it.

We don't do that.

[greenhouse]

To let you know, this is not a homework. I copied every single sentence from the internet. I just want to work on how to use punctuation and how to make a compound sentence. My intention is to practice English. I would not ask someone else to do my homework. It is hard to learn a new language. Thank you