First of all, your English is really good! These are minor corrections.

(1)
From my own perspective, learning over the Internet is better than that doing so in traditional classrooms. Firstly, if I could study online (one word), I don’t have to go to classrooms every day, I can study anywhere that is connected to the internet, such as like the library, my home, or a cafe. I don't have to live near the campus nor worry about housing; all I need is a computer and a well-connected Internet. It saves a great deal of money and time for me. What's more, it is easier to record online courses, so I can review before final exams.

(2)
When I was a child, I enjoyed going to the park near my home. It was landscaped with (easier to just say had) flowerbeds, lawns and some lush green trees. At the center of the park was a clear lake with ducks, waterfowl (ducks are a type of waterfowl, so take one of those words out) and waterlilies floating on the surface.The view varied with the four seasons, but was equally beautiful all year.I enjoyed going there for its ("its" is ambiguous) scenery and fresh air. What's more, I had plenty of things to do in the park.Sometimes I took a picnic with my family on the lawn. I also played with my friends there, such as splashing (where?) or skating (where?). It was really a great pleasure for me.

(3)
The college is supposed to cancel the free bus service, because there are few students that take the bus and it is expensive to operate the bus. The money saved by the bus service was supposed to expand the overcrowded parking lot. The man in the conversation opposed the opinion plan. He says the problem is that the bus route is out of date. The bus only goes through the neighborhood that is too expensive for students to live there. If the bus line has to be changed, more people will choose to take the bus instead of driving. Besides, cutting back the bus service and adding parking will encourage more and more people to drive, which will add noise and create more traffic, and that will increase the need for more parking spaces. He thinks the university should make it easier for students to take the bus, rather than harder.