Question

It was the happiest day of your life when your class teacher selected you all the best sports man of the year you are thrilled as now you will receive the award at the annual day make a diary entry recording the feeling

Answer 1

you could write about how surprised, how delighted you are. Teachers love idioms, synonyms and the like. "I was grinning ear to ear" "like a dog with two tails" "over the moon" "grinning like a Cheshire cat".