Welcome to EF!! I'm glad you are enjoying the sight. Thanks for posting!
opponenets
Be careful of little typos.
Hey, your first sentence is very well-constructed!
This unfortunate event proves that no matter how
much careful we are such accidents are unevitable.---No need for MUCH. Leave it out. Just like this:
No matter how
much deep the water is, I am going swimming!
:-) You don't need much help!! This kind of writing seems easy for you. Well done!