— I take the book out?—I'm afraid not.A. WillB. MayC. MustD. Need

问题补充：

— I take the book out?

—Im afraid not.

A. Will

B. May

C. Must

D. Need

答案：

A. Will

(答案→)B. May

C. Must

D. Need

解析：句意：——我可以把书带出去吗？——恐怕不能。请求对方允许时常使用can或may，故B为答案。