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Dear Chris

I¡¯ m Li Hua, a student at Chenguanp High School.

__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Thank you for your time.

Yours,

Li Hua

¡¾´ð°¸¡¿It¡¯s our great pleasure to have you visit our school and give a lecture on western art during the coming summer vacation.

When it comes to my suggestions, I am quite interested in western music, and expect that you could deliver the lecture on this topic. Served as a bridge, western music provides us teenagers with the opportunity to broaden our horizons and have a better understanding on culture diversities. It also gives us strength and hope when we are overcoming difficulties. On this topic, I advise that you could give a brief introduction on the history of western music as well as the features of some main categories on the music.

I would appreciate it if you could take my advice, and I hope that I can gain more knowledge through the lecture. Looking forward to your early reply. (The writing is provided for reference only)

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¡¾ÌâÄ¿¡¿ People born in winter are more likely to suffer mental health disorders, according to a recent study carried out by researchers at Vanderbilt University in Tennessee.

Researchers raised baby mice from birth to weaning in either ¡°summer¡± light cycles of 16 hours of light and 8 hours of dark or ¡°winter¡± cycles of 8 hours of light and 16 hours of dark. A third group experienced 12 hours of light and 12 hours of dark a day.

Then half the winter mice stayed in a winter cycle, while half switched to a summer schedule. The summer mice were similarly split. The mice raised in equal periods of light and dark were split into three groups, one of which stayed on the 12hour schedule, one of which joined the winter group, and one of which joined the summer group.

After 28 days, it turns out the summerborn mice behaved the same whether they stayed on the summer cycle or switched to winter. But among the winterborn mice, those that stayed in winter kept their previous schedule, while those that switched to summer stayed active for an extra hour and a half, which indicates that mice born and weaned in a winter light cycle showed dramatic disruptions in their biological clocks.

The finding is the first of its kind in mammals, and it could explain why people born in winter are at higher risk for mental health disorders.

¡°We know that the biological clock regulates mood in humans,¡± said study researcher McMahon. ¡°If the mechanism similar to the one that we found in mice operates in humans, then it could not only have an effect on a number of behavioral disorders, but also have a more general effect on personality.¡±

¡¾1¡¿What¡¯s the main idea of the text?

A.The biological clock regulates mood in humans.

B.Being born in winter has a negative effect on people¡¯s mental health.

C.People born in winter are at higher risk for physical health disorders.

D.The length of light will influence the behavior of the mice.

¡¾2¡¿The underlined word ¡°split¡±(Paragraph 3) can be replaced by ________.

A.dividedB.torn

C.hitD.ended

¡¾3¡¿Who is probably the reader of the passage?

A.A jobhunter.B.A student in the university.

C.A newlymarried couple.D.An experienced dentist.

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