31.  Trees are very useful, we should plant trees, and Let them do good to us .

32.  Perfect as us , happy as us ought to study more hard than them .

33.  He swam closer to the girl and caught hold of her arm and them swam back.

34.  When I got to he river bank, I found that there was several children swimming in the river.Many of them were good at swimming.

35.  And them , I saw a mother teahesing her daughter how to swim.

36.  There is a flag-pole before them.

37.  We often think of them whole having the ceremony .

38.  He said eight students' name , my name was in them sn8,13-6] , I thought I will be awarded, But it next ,Teacher Zhu asked us to carry the desk next Monday.

39.  The Emperor was caught by them.

40.  When he stepped back into the cave, he found that was a god hiding place .One morning, he saw nine savages sitting around a fire and eating something they had cooked in the fire: After they had been away, crusoe found the bones of a human being, crusoe knew that the savages hilled their enemies and ate them, He made up his mind to shot them if they came again.