I like science best. what is your favorite subject?A. SorryB. Tell meC. Let me knowD. By

问题补充：

I like science best. , what is your favorite subject?

A. Sorry

B. Tell me

C. Let me know

D. By the way

答案：

A. Sorry

B. Tell me

C. Let me know

(答案→)D. By the way

解析：by the way 插入语表示“顺便问一下”。