As children they are about the things that they don't know about A. curiousB. particular

问题补充：

As children, they are about the things that they don know about

A. curious

B. particular

C. angry

D. careful

答案：

(答案→)A. curious

B. particular

C. angry

D. careful

解析：考查形容词：A. curious好奇，B. particular特殊，讲究，C. angry生气的，D. careful仔细的，句意：做为孩子，他们对他们不知道的事情很好奇。选A。