每空一词：
题目
每空一词：
____did you do last night?you look tired.i'm very_____.I slept very little last night._____you out somework?no,ididn't.i worked for the exam all night.we're not going to have the exam today.oh,my god._____are we not going to have the exam?____miss white is ill today.
no,ididn't.____you____all your home work
答案
what sleepy did why because did finished
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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