B: I agree with you.

A: I think alcohol is just as bad as marijuana.

B: Well, I don't know about that.

A: The ads encourage children to eat junk food.

B: I can't go along with you on that point.

A: Do you agree with my opinion?

B: Yes, I do.

A: Do you think this will work out?

B: I doubt it.

A: I think all we have to do now is cut down on our expenses.

B:  I agree with you.

A: Let me get down to the main business.

B: Okay.

A: Are you for or against this plan?

B: I'm for it.