-- The boy can speak both English and Japanese he is only ten.-- Wow what a clever boy!A

问题补充：

-- The boy can speak both English and Japanese he is only ten.

-- Wow, what a clever boy!

A. if B. because C. though

答案：

解析：if 是否，如果； because因为；though虽然，尽管。句意：虽然他只有十岁，但是这个男孩既能说英语又能说日语。——喔，多么聪明的孩子啊！结合语境可知选C。