We did not discover that his apprehension concerning our hypothesis was______until well afterward, following a series of rigorous trials and revisions, at which point our experiment proved an unqualified success.

A． apathy : feelings
B． symphony : prom
C． cello : dirge
D． existence : extinction
E． lethargy: ennui

A． reinstatement : position
B． depravity : virtue
C． glee : ecstasy
D． misery: anticipation
E． appetite : desire