—I think everyone has a role to play in making the planet a better place.—Yes indeed. .A.

问题补充：

—I think everyone has a role to play in making the planet a better place.

—Yes, indeed. .

A. I’m with you on that

B. That couldn’t be better

C. You have got something

D. I’ll do my best

答案：

(答案→)A. I’m with you on that

B. That couldn’t be better

C. You have got something

D. I’ll do my best

解析：考查交际用语。A我同意你的观点。B我很同意。结合句意可知A正确。句意：—我认为在把我们的地球建设成一个更好的地方方面每个人都会起很大的作用。—是的。实际上在这一点上我很同意你的观点。