从图中可以看出①粮食和轿车是替代商品 ②需求是有弹性的 ③不同商品的需求对价格变动的反应程度是不一样的 ④价格变动对粮食需求的影响比较小，对轿车需求的影响比较大
I have _____this book for two weeks. I have to return it now. A. borrowed B. kept C. had
Now most families in China have only one child _____ the one-child policy. A. because of B. instead of C. in order to
Mrs. Smith _____ in Beijing since 2008. A. livedB. has livedC. lives
— Where are Maria and Kangkang? —They _____ England. A. have been to B. have been in C. have gone to
China has ______largest population of the world . A. theB.a C. an
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