问题补充:
--- Is that your backpack?
--- . It’s my backpack.
A. No, they’re not.
B. Yes, they are.
C. No, it isn’t.
D. Yes, it is.
答案:
A. No, they’re not.
B. Yes, they are.
C. No, it isn’t.
(答案→)D. Yes, it is.
解析:句意:那个是你的背包吗?是的,它是我的。根据后面的It’s my backpack.可知,背包是我的;B项单复数不匹配;故选D。