根据短文内容填空,每空一词（有题~）
题目
根据短文内容填空,每空一词（有题~）
When i was young,I studied___a middle school.Our headmaster(校长）was_____old man.He was kind but all of ___were afraid of him.___example,we were playing,talking and laughing___he came in.At once,the classroom became____.If a boy didn't ___his homework well or carefully,he would be very___,and asked the boy____do it again and____.
答案
in/at,an,us,For,when,quiet/silent,do,angry,to,again.
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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