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

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

(答案→)C. Actually

D. Generally

解析：句意：--你认为和你的同学交朋友是好主意吗？--事实上，我认为是个好主意。really真的； obviously显然； actually事实上；generally 一般地。故选C。