sentences making

1.He experienced a lot of cultural differences and different customs after he moved to USA in the last year.
2.He drew back his hands all of a sudden while his hands touched the burning cooking stove carelessly.
3.The enemies drew off their armies at last because of a shortage of food and the supply of ammunition.
4.Her elder sister had to take another examination last week because she failed to pass the one she took last year.
5.The boy's mother should have taken his son to the amusement park because that the other children who went there last night said they had a lot of fun there.