Please correct my sentences
fear
1.A little boy mentioned his fear of the dark and began to cry.
2.She fears she will be dismissed because of the mistake she made.
3.The mother fears for her daughter whenever the daughter doesn't arrive at home on time.
4.A lot of person fear leaving their hometown because their hometown makes them feel safe.
5.He feared the challenge, since he failed last time.
afraid
1.I'm afraid that the wallet that you just lost isn't here.
2.He's afraid of standing at heights, especially at the edge.
scare
1.I was horribly scared when the big dog passed me quickly in the evening yesterday.
2.I met the dog that gave me huge scare, and I wasn't afraid of it.