Some children want to challenge themselves by learning a language different from their parents speak at home.
A. what
B. that
C. which
D. one
网友回答
(答案→)A. what
B. that
C. which
D. one
解析：本题考查的是名词性从句的结构。根据空格前面的介词from可以判知，from后面是一个宾语从句。然后对该宾语从句的句子成分进行分析后可知，其谓语动词speak后面缺宾语，what在这里表示肯定的意义(某人所说的….话)，故选A。B项只能引导结构、意思都完整的宾语从句，C项表示疑问的意义，D项不能引导宾语从句。