I was the most impressive thing you've ever done is English academy voca test finish because vo ca test is very hard. And I'm going to school election because election is very hard.

Here's your corrected composition, Jimmy.  Please go over the revisions given below. Have a good evening! 

Cheers,

Jean~~

                               

                                      What was the most impressive thing you've ever done?

I was the most impressive thing you've ever done is English academy voca test finish because vo ca test is very hard.

>> The most impressive thing I've ever done is finishing the difficult vocabulary test at the English academy. 

And I'm going to school election because election is very hard.

>> And I participated in the school election, which was very challenging.