71.  Our school is also big and beautiful, to the east of it stands a laboratory building, we can do physics, and chemistry in it , to the west of the aching building stands a big .

72.  The teachers in our school are all excellent, they have good learning and rich experience, they are strick with us.We all show repect for them.

73.  they also give off fragrance, they Decorate the house and make the environment clean , they bring happy for us .

74.  Plant flowers is a knowledge, we must water them every day and apply fertilizer properly .

75.  When they grow up, we must change another flowerpot, and trim them, if we don't do , they will be withered .

76.  can clean the air, when the air is dirty, it take in the harmful gas and give out the O2 , then the air becomes good, and it make us good health .

77.  Trees also can stop the win and swift water from taking out the soil then it do good to the farms, and make the harvest good .

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

79.  I have done more English excerses , but I still lazy to read and recide the text, I am too lazy, how can I get rid of it ?

80.  Though they are incompleted of their body , they still work hard and study hard.