I guess we've already talked about this before but I'll ask you again just . A.

I guess we've already talked about this before but I'll ask you again just __ .

A. by nature　 B. in return　 C. in case D. by chance

试题答案

C

分析四个选项的意思：by nature 天生地；in return作为回报，作为交换；in case 万一，以防；by chance偶然地。根据句意：我想我之前已经跟你谈论过这件事，但是以防万一，我再问你一次。