单项选择题

He is ______ about his chances of winning a gold medal in the Olympics next year.

A.optimistic
B.optional
C.outstanding
D.obvious
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问答题
汉语被认为是世界最古老的语言之一,它体现了中国人的想像力和创造力。汉语不仅对其他几种语言影响很大,而且是联合国五种工作语言之一。虽然使用范围不如英语广,但正日趋流行。美国科学家通过观察和研究发现,华裔儿童擅长数学的原因之一是他们经常写汉字。
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You should spend no more than 20 minutes on this task. You have moved into a room on campus, but you find something wrong with the room. Write a letter of complaint to the student affairs office. You should write at least 150 words. You do NOT need to write your own address. Begin your letter as follows: Dear ______.
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