文章大意:真笑和假笑都能给我们带来快乐。
1.When we smile sincerely, ________.
A.bones in our face become thin
B.muscles in the face become smaller
C.the brain's dopamine neurons stop working
D.the brain's motor cortex starts to work
答案:B 细节理解题。根据第二段“The muscles that attach to these bones become smaller when we are happy or when we want to laugh”可知,答案为B。
2.The underlined word “prompts” in Paragraph 4 can be
replaced by
________.
A.causes
B.charges
C.controls
D.reduces
答案:A 词义猜测题。根据第四段“The release of dopamine in the front half of our brain is accompanied by a real smile”可推断,prompt意为“引起”,故答案为A。
3.What is the RIGHT order of the following actions?
①more blood flows into the brain
②smile
③shape of the thin facial bones is distorted
④release of dopamine
A.②③①④
B.②①③④
C.②①④③
D.②④③①
答案:A 细节理解题。根据末段“When we smile... slightly distorts (扭曲) the shape of the thin facial bones”和“... leads to an increase in blood flow into the brain and then increases the release of dopamine”可知,答案为A。
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