1．A　细节理解题。根据文章中科学家所提供的人们每天必须的7类食品，可知作为中餐食品的A类最佳。

　　2．D　细节理解题。根据Paragraph 2 可知人们每天吃几餐不重要；在哪个时间进食不重要；吃生的或熟的、罐装的或冷冻的食品不重要，重要的是人们必须吃到这七类食品的每一种。

　　3．D　细节理解题。根据文章内容，不同的国家和地区，人们进食的方法也不一样。

　　4．B　推理判断题。在Paragraph 3 里提到要解决的两个问题，如果有Paragraph 4, 那么应该就是议论如何来解决这两个问题。

　　Ⅱ.阅读填句

　　We all know the importance of curiosity, and here are some tips on how to develop it.

　　Keep an open mind. This is essential if you are to have a curious mind. Be open to learning, unlearning, and relearning things. __1__ Therefore, you should be prepared to accept this possibility and change your mind.

　　__2__ Most people just accept the world as it is. This way, they will certainly lose the “holy curiosity”. Try to dig deeper beneath the surface of what is around you. A sure way to dig deeper beneath the surface is asking questions. What, why, when, who, where, and how are the questions curious people always ask.

　　Don't label anything as boring. Whenever you label something as boring, you close one more door of possibilities. Curious people are unlikely to consider things boring. __3__ Even if they don't yet have time to explore them, they will leave the door open to be visited another time.

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