—Excuse me.Is this the right way to the Summer Palace?—Sorry I am not sure.But it be.A.

问题补充：

—Excuse me.Is this the right way to the Summer Palace?

—Sorry, I am not sure.But it be.

A. might

B. will

C. must

D. can

答案：

(答案→)A. might

B. will

C. must

D. can

解析：根据提供的情景“I am not sure.” 可以确定应用might，表示可能性。