—Good afternoon,Madam.____?—No,can you help me please?—Yes,Madam.What are you looking for?
题目
—Good afternoon,Madam.____?—No,can you help me please?—Yes,Madam.What are you looking for?
—I'd like to buy a needle.
A.Are you waiting for me B.Would you like anything else
C.Have you been waited on D.What can I do for you
答案
C Have you been waited on
已经有人（服务员）接待您了吗?
（言外之意：如果没有的话我愿意帮助您.）
这是一种委婉的说法.
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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