02/27 writing - 英檢

打哈欠的原因：
閱?：Three theories concerning of yawning:
1) 當血液內氧氣?足時會打哈欠；
(Oxygen shortage inside the blood will make yawn.)
2) 胎兒用打哈欠?排除對肺部有害的液體；
(Fetus is used to expel the harmful liquid in lungs before being born.)
3) 打哈欠是為讓血液?到腦部。
(Cool blood flowing in the brain.)
聽?：The female professor refutes:
1) 血氧充足時人還是會打哈欠；
(The blood oxygen is ample still yawn.)
2) 很多在嬰兒時期的?為如吸吮手指會在長大後消失，可是打哈欠這種?為沒有消失；
(A lot of baby behavior such as sucking the hand, will disappear after growing up, but yawn not disappear.)
3) 在環境溫?較低時，人就?應該打哈欠?，可是無?環境如何，人還是會打哈欠。
(In the lower environment temperature, the person should not yawn, but no matter how environment is,
people still yawn.)
孩子應該?加哪種?型的運動：
Children should only play sports for fun, or play sports in competition or contests?


我朋友從台灣打來跟我講的
我是北美考生
加油啦

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