81.   They will be good to our study together.

82.   Boundaries among groups and races can cause many problems which are not good to the development of the world.

83.   Green can make our city clean air, beautify our city, improve our climate and so on and green can be good to our health.

84.   I think it is good to us.

85.   Going abroad to study

86.   Study abroad can help us kids know many different cultures , and it is very good to our independence as we should do everything on our own.

87.   Secondly, activities are good to us both physically and mentally.

88.   Surfing on the internet is also good to us.

89.   In my opine, a healthy diet is good to your health and can make you live longer.

90.   On one hand , which is the sticking point , we must consider it of great importance and are aware of what we do can make for protecting the environment and is good to the Low-carbon Lifestyle .