1.They separated the rice from the hush.
==> The rice was separated from the husks
2.The boys made a fire by their camp.
==> A fire was made by their camp by the boys
3.They built this house more than one hundred years old.
==> This house was built more than one hundred years old
4.Every year Viet Nam exports millions of tons of rice.
==> Every year millions of tons of rice are exported by Viet Nam.
5.Vietnamese people celabrate their Lunar New Year around January or February.
==> Vietnamese Lunar New Year is celebrated around January of February.
_________~ GOOD LUCK ~_________