Dear Tom,
I was very glad to receive your letter on June 4th.At your request,I'll tell something about my summer holiday.
I'm joining an science- summer camp in summer vacation.During our first day at summer camp we were told to tell parents that we had arrived safely.
Every day we should get up early.(to describe the all day life)
I'll appreciate it if you can tell me something about your school life in your next letter.I'm looking forward to it.
With best regards.
Yours truly
XX