Good morning!What can I do {}you?I am looking for a pair of black shoes.What size{}you want?
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Good morning!What can I do {}you?I am looking for a pair of black shoes.What size{}you want?
Size 10.Sorry,I am {}we haven"t got any black ones in that size at the moment.Have you got any other kind/ What about those shoes over there?Well,that color looks nice.How {}do they cost?Two hundred yuan.OK.Can I {} them on?Certainly..会英语的网友们帮帮我吧,真的谢谢你们了!
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for
do
afraid
much
try
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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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