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
网友回答
A. by nature
B. in return
(答案→)C. in case
D. by chance
解析：词组辨析题。 A. by nature 天性 B. in return 作为回报 C. in case 万一 D. by chance 偶然句意：我想我们以前谈论过这个话题但是我会再次问你以防万一。 根据语境选C