) and lead to the topic of this unit.

(So you see, mysteries are of vital importance to the world. That's why we shall begin to learn something about them. Bb: The topic of the unit. Then what kind of attitude should we adopt towards mysteries?-Bb: show interest in ...; be curious about ...; trace the causes of ...; analyze ...; cooperate with ...; seek help from ...; work intelligently and independently; find solutions to ... Before we take up the unit, I have two more questions for you.)

Let's watch a short video, what's flying in the sky? Is it a UFO? What other unexplained things do you know about?

[设计说明]

(1) 以问题讨论开始，不仅可让学生发挥他们的想象力，还可激发他们的学习兴趣。

(2) 以爱因斯坦以及他关于神秘事物的名言为例, 引出本单元话题，同时旨在激发学生探索世间奥秘的兴趣。同时结合一段UFO飞行的视频，激发学生对未解开之谜的探讨。

(3) 其中的板书设计旨在指导学生在探索发现问题和解决问题时需要具备哪些常见的基本条件，我认为这应该是本单元的学习目的之一，同时也希望能借此适当丰富一下学生的词汇。

(4) 图片展示是为了帮助学生回答问题，最后一个问题是为活跃课堂气氛，也希望能帮助增强学生的自信心。

Step 2 Posters

1. Pair work:

● Please open your books and let's look at page one. Read the instructions and focus on the five pictures and illustrations first. Then work in pairs to find the answer to the following questions. (PPT11-12)

(1) Do the five pictures have something in common? If so, what is it?-unexplained; no satisfactory answers; mysterious; no evidence to prove ... ;

(2) Can scientists explain these phenomena?

(3) How do you feel about them?

● Think of as many expressions as possible to answer the questions above. Try to make up some sentences and read them to the class. First I will offer you some examples.ppt13-They are mysterious because no satisfactory answers have been offered to explain them so far. Though these mysteries have puzzled people for a long time, they still show great interest in them. People feel puzzled by the mysteries ...