1、Which of the following three subjects would you choose to learn? Math, painting or science. And what you want to learn from this subject. Please include specific reasons and details in your response.
2、What are the benefits of chatting with older family members? Please include specific reasons and details in your response.
3、What community service task would you like to do: A.help young children with their homework. B.teach old people how to use computer. C.clean a city park.
4、If you have a chance to give a lesson in an elementary school, what topic would you like to teach: 1. How to protect the environment. 2.How to grow plants. 3.How to cook simple and healthy food. Please explain your choice with specific reasons.
5、Describe a person in your family whose personality or behavior is very different from yours.
综合写作:
奥陶纪(Ordovician)末期导致海洋生物ocean life大量灭绝extinction原因。 The causes for the mass extinction of ocean/ marine life at the end of Ordovician.
阅读部分
海平面说:气候变冷,温度下降,导致ice sheets形成,导致海平面下降
陨石撞击说:小行星撞击地球,灰尘遮住太阳
超强紫外线说:太阳暴走,臭氧层破坏,太阳紫外线UV过强,强杀死一种生活在表层surface of de ocean的Tri水生生物(注:推测:可能是古生物trilobite三叶虫)。化石为证,一种海洋生物那时候在海洋表面绝迹了
听力部分
冰川期海平面降低是漫长的过程,有几千年,气候变冷很缓慢,不会造成大灭绝。生物灭绝是在奥陶纪初期瞬间开始的,那个时候海平面还没那么低
小行星撞击要残留下坑impact crater和radium deposit,但是目前没发现那个时期的crater
化石的那种生物现在还有,而且形成化石的那种海洋生物具体在哪生活,我们不确定,可能生活在海底更深的地方。紫外线只能杀死地球表面的生物。杀不死Tri水生生物
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