单选题_____ASinceBWhileCAlthoughDUnless

单选题
_____
A

Since

B

While

C

Although

D

Unless


参考解析

解析:
后一句话阐述了前一句“人们记忆最清楚的事件是与情感联系在一起的”的原因,since有“因为”之意,符合题意;while尽管,虽然;although尽管;unless除非。故选A。

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