Stronger and more lasting memories are likely to be formed a person is relaxedA. whereB.

问题补充：

Stronger and more lasting memories are likely to be formed a person is relaxed．

A. where

B. unless

C. when

D. although

答案：

A. where

B. unless

(答案→)C. when

D. although

解析：考查连词的用法。句意：当一个人放松的时候，更强更持久的记忆力很可能会被形成，所以选连词when 。