-Do you think it’s a good idea to make friends with your students?-- I do. I thin

问题补充：

---- Do you think it’s a good idea to make friends with your students?

---- , I do. I think it’s a great idea.

A. Really

B. Obviously

C. Actually

D. Generally

答案：

A. Really

B. Obviously

C. Actually

D. Generally

解析：

句意：“你认为和你的学生交朋友是个好主意吗？”，“我认为是个好主意”。由下句的肯定回答可知赞同对方的观点，所以用C. Actually 。