－What is your math teacher like Nick?－She is very kind she looks a little serious. A. al

问题补充：

－What is your math teacher like, Nick?

－She is very kind she looks a little serious.

A. although

B. if

C. so

D. until

答案：

(答案→)A. although

B. if

C. so

D. until

解析：本题的含义是虽然她看起来有点儿严肃，但是她很和善，although表示尽管的意思，引导让步状语从句，故本题选A。