2016年托福考试8月写作预测七

　　综合写作：

　　The decrease of human brain

　　人脑缩小的原因

　　READING

　　3 possible explanations.

　　1.Climate change.

　　Small body can adjust to hot temperatures, so human brain shrinks in accordance with the body.

　　2.Changes of agricultural lifestyle.

　　Smaller brain fits the diet when people start eating grain, with protein and vitamin in it.

　　3.Changes in human muscle mass

　　Human muscles have shrunk, which leads to the decline of muscle-controlling brain.

　　Against.

　　反对

　　1.过去温度也在变化，但人脑持续变大，所以人脑大小和气温无关

　　The size of human brain has nothing to do with temperatures. The brain keeps getting larger and large no matter temperatures go up or fall down.

　　2.有些地区最近才有生活方式的改变，但人脑变小在全球几乎是同一时间发生，所以不可能。

　　Lifestyle appears in different times. There was no such trend in Australia and South Africa until recently. Yet the decline of human brain occurs at the same time around the world. So this assumption cannot be true.

　　3.肌肉群知识略有缩小，而人脑变小了很多，所以这不可能是主要原因。

　　The size of human muscle mass only decrease slightly, yet brain size gets much smaller. So this cannot be the major reason.