请帮我修改下列文字中的词语与语法错误.

China,our homeland,within its large territory there are a lot of poor and pain men,so we must work hard!We must make them to be rich and happy.
I love the people,and my whole livelihood is given by them.So I must work hard during my life time for the people and make more of them to becoem rich and happy.

China is our homeland.In the main land there are a lot of poor men ,a lot of men who feel painful.we must work hard!we must make they be rich and happy .
I love the people. The people gives all my life.I must work hard in my left time for the people ,and make more people change rich and happy.

China is our homeland,There are a lot of pooy men and pain men in the large land,We must work hard!!! we must make them rich and happy
I love these people,they give me all my liveihood,
we must work hard in our life time for these people.and make more people rich and happy.

China is our homeland,there are lots of poormen ,painmenon the large land.So we must work harder and make theirs life better when we are older.
I love my parents,my livehood all are parents give me,so we must work harder for the people.And make more people live well like me in the world.