Although Henry was not in general a sentimental man, occasionally he would feel a touch of ________ for the old days and would contemplate making a brief excursion to Boston to revisit his childhood friends.
句意： 尽管亨利算不上是多愁善感的人， 但他偶尔会怀念往日时光， 并打算去波士顿短暂旅游，以问候他的童年挚友。nostalgia怀旧。 anxiety焦虑。 chagrin懊恼。lethargy死气沉沉。 因此， 本题的正确答案是C。