— Whose book is this?—It must belong.A. Diana B. Diana’sC. to DianaD. to Diana’s

问题补充：

— Whose book is this?

—It must belong.

A. Diana

B. Diana’s

C. to Diana

D. to Diana’s

答案：

A. Diana

B. Diana’s

(答案→)C. to Diana

D. to Diana’s

解析：句意：——这是谁的书？——它一定属于戴安娜。belong to sb.属于某人。故选C。