Children are always curious the unknown world.A. forB. ofC. beyondD. about

问题补充：

Children are always curious the unknown world.

A. for

B. of

C. beyond

D. about

答案：

A. for

B. of

C. beyond

(答案→)D. about

解析： 考查固定结构。Be curious about...对……感到好奇。句意：孩子们总是对未知的世界感到好奇。所以选D。