—Do you think I should accept his invitation Jim?—If I were you I certainly would.A. Non

问题补充：

—Do you think I should accept his invitation, Jim?

—If I were you, I certainly would.

A. None of your business.

B. It depends.

C. Why not?

D. I don think so.

答案：

A. None of your business.

B. It depends.

(答案→)C. Why not?

D. I don think so.

解析：考查交际用语。A不关你的事情；B看情况而定；C为什么不？D我不这么认为。句意：—你认为我应该接受那个邀请吗》—为什么不？如果我是你，我就接受。根据后面的If I were you, I certainly would.说明后者建议他接受。故C正确。