he is only 8 years old he knows more about science than his father .A. ButB. ThoughC. So

问题补充：

he is only 8 years old , he knows more about science than his father .

A. But

B. Though

C. So

D. Because

答案：

A. But

(答案→)B. Though

C. So

D. Because

解析：考查让步状语从句。But“但是”；Though“虽然，尽管”；So“因此”；Because“因为”。句意“尽管他只有八岁大，但是关于科学，他知道得比他爸爸多。”故选B。