My Hobbies

I like to swim very much because it's very good for my health.
Swimming helps me feel more comfortable, more strong, and more supple.
I can have some friends swim together. --> I can swim together with some friends.
I'll talk to you about the most of my memories.   (or)--> I'll talk to you about one of my best/favorite memories. (sounds better)
That is once, I went to swim in Ha Long beach. --> One time/Once, I went to swim at Ha Long beach.
That day, I with two my friends swam from the seaside to the warning bouy yellow, the distance about five hundred metres.--> That day, my friends and I swam from the seaside to the yellow warning bouy. The distance was about five hundred meters. (metres- non-American spelling/ meter- American spelling)

Although, I knew it's very danger but, we still continued and finally we were success --> Although I knew is was very dangerous, we still continued and were finally successful.

That is the time I swam the farthest and I feel(felt) the happiest.
In summary, swimming is very good for our health.
Thanks you for reading !

My Hobbies

I like swimming very much because it's very good for my health.
Swimming helps me feel more comfortable, more strong and more supple and stronger
I can have some friends to swim together.
I'll talk to you about the best of my memories,
That is once when I went to swimming in Ha Long beach.
On that day, I and my two my friends swam from seaside to the warning bouy yellow line. The distance was about five hundred metres.
Although, we knew it's very dangerous but we still continued and finally we were successful
That was the time I swam farthest and I felt happiest.
In summary, swimming is very good for our health
Thanks you for reading !