Leo got a special birthday present from his scientist aunt. It was a white T-shirt. "It looks... normal(普通的)," he said, trying to sound polite.
His aunt smiled and said, "Just wear it outside. You'll see something wonderful!"
The next morning, Leo wore the new T-shirt to the park. When he ran in the bright sun, something amazing happened. The white T-shirt started to change colour! Beautiful blue seas and cute tall giraffes appeared on it. The pictures became brighter and clearer after he stayed in the sun longer. All his friends got around him, pointing and asking, "How did your T-shirt do that? How amazing!" In fact, Leo didn't know how it happened either. When he walked under a tree, the colourful pictures were slowly gone. The T-shirt turned white again. Leo was intrigued. So he asked his aunt about it.
After dinner, his aunt explained(解释) the science to him. "There is special paint with tiny colour-changing molecules(变色分子) on this T-shirt. When you're inside, these molecules are sleeping and the T-shirt looks normal. But when you go outside, the sunlight wakes them up and makes them show beautiful colours!"
Now, this special T-shirt is Leo's favourite thing to wear. On sunny days, he loves watching the designs come out and surprise his friends. Sometimes he even runs outside and inside to make the colours come and go. Through this fun T-shirt, Leo learned that science can even get into the clothes we wear. Fashion isn't just about looking good. It can be fun, surprising and smart too. Who knew science could be so cool to wear?
()51. How did Leo feel when he first saw the T-shirt?
A. He was surprised and wanted to try it on.
B. He got very excited and loved it at once.
C. He knew it was an expensive T-shirt right away.
D. He thought it normal and was a little unhappy.
()52. What made the pictures appear on the T-shirt?
A. The sunlight outdoors.
B. His running skills.
C. Water from the sea.
D. His friends' questions.
()53. What do the underlined words "was intrigued" in Paragraph 3 mean?
A. Got a little angry.
B. Became very tired.
C. Wanted to know something.
D. Was not interested in something.
()54. According to Leo's aunt, why does the T-shirt change colour?
A. It can read Leo's feelings.
B. It has a small computer inside.
C. It is made of a special kind of cotton.
D. It has something special in the paint.
()55. What did Leo learn from this T-shirt?
A. Birthday presents are always the best.
B. Science can be a fun part of everyday life.
C. It is important to have fun and smart clothes.
D. Different people like different kinds of fashion.

B [文章大意]本文主要讲述了里奥收到了姑姑送的变色T恤衫的故事。这件T恤衫在阳光下会显现出图案,姑姑解释了其变色的原理——T恤衫的颜料里含有特殊的变色分子。最终,里奥体会到科学可以融入日常生活。
51. D [解析]细节理解题。根据"'It looks... normal(普通的),' he said, trying to sound polite."可知,里奥一开始觉得T恤衫很普通,有点不太开心。故选 D。
52. A [解析]推理判断题。根据"When he ran in the bright sun... The white T-shirt started to change colour! Beautiful blue seas and cute tall giraffes appeared on it."可推知,是户外的阳光让T恤衫显现出了图案。故选 A。
53. C [解析]词义猜测题。根据"When he walked under a tree, the colourful pictures were slowly gone. The T-shirt turned white again."及"So he asked his aunt about it."可知,T恤衫在阳光下显色,在树荫下褪色。由此可推知,画线部分"was intrigued"指的是里奥对这种现象"感到好奇"。故选 C。
54. D [解析]细节理解题。根据姑姑的解释"There is special paint with tiny colour-changing molecules(变色分子) on this T-shirt."可知,T恤衫的颜料里有特殊的变色分子。故选 D。
55. B [解析]推理判断题。根据"Leo learned that science can even get into the clothes we wear... It can be fun, surprising and smart too."可推知,里奥通过这件T恤衫认识到科学可以成为日常生活中有趣的一部分。故选 B。
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