I would say
Only Gerasim recognized it and pitied him.
Gerasim alone did not lie; everything showed that he alone understood the facts of the case and did not consider it necessary to disguise them,
B.) Had left
The bus had left by the I arrive at the station
The answer is variant B. participle because is an adjective because he determine the noun 'man' and wich has formed by a participle verb.('to daze')
