Is the backpack on the desk? .A. No it is.B. Yes it isn’t.C. Yes it is.D. No it’s no.

问题补充：

Is the backpack on the desk? .

A. No, it is.

B. Yes, it isn’t.

C. Yes, it is.

D. No, it’s no.

答案：

A. No, it is.

B. Yes, it isn’t.

(答案→)C. Yes, it is.

D. No, it’s no.

解析：这个一般疑问句的肯定回答是：Yes,it is.否定回答是：No,it isn’t .所以选C。