peace be upon you
I wanted to correct the exercise if nobody minds
well امل نجاح
the second sentence,I guess as we say in french (faute de frappe) listening and explaining
the third sentence ,the second part the past simple of the verb to find is found so it will be like that she found her lost ring
the same thing with the fourth sentence the past simple of the verb to meet is met so it will be like that I met my friends
in brief,you have to concentrate and revise your irregular verbs
BEST OF LUCK