下列函数中，是反比例函数的为（　　）

“孔子周游列国”“烽火戏诸侯”，与“列国”，“诸侯”相关的西周政治制度是（    ）

造成黄土高原水土流失的土质原因是（　　）

① How does Amy feel? ____     A. I went swimming．

② What did you do last weekend? ____     B. He is a teacher．

③ Where does John come from? ____     C. He comes from the USA．

④ What's your father's job? ____     D. We have English and music．

⑤ What do you have on Mondays? ____     E. She is tired．

⑥ What is the tiger doing? ____     F. Please hold on．

⑦What will you do for your mum? ____     G. At 7: 00 a．m．

⑧Whose dog is it? ____     H. I'll cook noodles for her．

⑨Can I speak to your mum，please? ____     I. It's walking．

⑩When do you do morning exercises? ____     J. It's hers．