Nowadays , we can easily find that the study environment is changing. In the past, we have a little homework and we have many free time .We can do anything we like in this free time. At the same time , we can paly with our friends and families at weekends. However, we are faced with too many homeworks and so heavy pressure now . We are busy with studying in the day and even the ninght. As a result , we have to give up our enjoys sometimes and choose to study at weekends.