Что не правильно в предложении: My opinion, the birthday of the most important holidays;
It was become the fun;
I have waited for this;
Idea of how you can celebrate
In my opinion, birthday is the most important holiday или one of the most important holidays
It has become fun
I have been waiting fot this
I have an idea how you can celebrate
IN My opinion, the birthday IS ONE of the most important holidays;
It was funNY;
I have BEEN waitING for this BIRTHDAY;ИЛИ I have BEEN waitING for IT
I HAVE AN Idea how you can celebrate или
THE Idea of youR celebratING IS