今年的假期,你打算做些什么呢?试着用be going to 的句子来写一封信告诉你的好朋友（不少于5句）

Dear Tom,
Summer vacation is coming.I'm to do something interesting.I'm doing to visit Hong Kong first.
Then I'm going to learn to play the guitar.And I'm goning to join a sports club.I want to keep
healthy.At last I'm goning to climb the Mountain Tai.What about you .Please write to me soon.
yours,xxx