If you keep doing this,Jack,I'll tell it to the teacher.I'm ___ ,you know.

问题描述:

If you keep doing this,Jack,I'll tell it to the teacher.I'm ___ ,you know.
A.worried
B.careful
C.serious
D.intereted


C.

根据题目可知,这是对Jack说的警告.

serious,严肃的;认真的

I am serious. 我是认真的.