求高人回答托福口語題.

題目：

求高人回答托福口語題.
Some students prefer to study or work on difficult class assignment early in the morning.Other students do this type of work in the evening.Which way do you prefer and why?

解答：

I prefer to do my class assignment in the evening,becasue I think evening time is the most efficient period to work on my homework in whole day for me.On the contrary,in the morning,the human body has not been in normal operation,so it is not good to do the mental work in this period.On the other hand,the air including a lot of carbon dioxide in the morning which is not more fresh than that is in the evening,I think that is bad for people's healthy.So studying in the evening is my best choice.