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21.What was Bob's dream
A.To be a writer.
B.To be a scientist.
C.To be a teacher.
D.To be a businessman.
22.What does the underlined word "it"refer to in Paragraph 3
A.The peanut kernel.
B.The small peanut
C.The red skin of the peanut
D.The white fruit of the peanut.
23.Which of the following shows how Bob's feelings changed
ASad-→calm一happy
B.Worried-→proud→sad
C.Sad→confused-→thankful
D.Worried→elaxed-→proud.
24.What can we know from the last paragraph
A.Bob will give up leaming physics
B.Bob's mother will help him with his leaming
C.Bob's mother will advise him to change his dream.
D.Bob will learn from his mistakes in the physics exam.
25.What does the passage mainly tell us
A.Dreams are important for young people.
B.Not everyone can achieve his or her dream
C.Only by studying hard can we achieve our dreams.
D.We should have a strong heart to achieve our dreams.
DHobbies not only make us happy,but also keep our brains healthy.
②A Canadian study found that long-term hobbies can improve the brain'sstructure(大i脑结
)The research studied 58 people who love bird-watching.Half were experts,while the other half
were beginners.Both groups included pcople of different ages,from the 20s to the 70s,and were similar
in education level.
③During brain scans(扫描)，volunteers saw a bird photo for less than four seconds.Then,they
had to pick the bird from four different pictures.This test was done 72 times,with 18 different kinds of
birds.
The expert group successfully picked out 83 percent of local birds and 61 percent of non-local
ones,while the beginners only got 44 percent right for both.The scans also showed differences in brain
structure:the areas responsible for attention and working memory were more compact (in the
experts,no matter the age.These areas also "lit up"when the experts tried to pick non-local
birdssomething that did not happen in the beginners'brains.
A 2025 study found that creative hobbies,like music and dancing,are also good for the brain.
The brains of dancers appeared over seven years younger than their actual age.Al models also showed
that even short-term creative leaming.like 30 hours,can "rurn back time"for the brain."Creativity
shapes not only culture but biology(生理)，”the scientists wrote on The Conversarion.
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