Answer is active. The subject is the doer of the action
He probably pointed out that they looked similar because Stryver asked one of the two accusers after being given the note, if he had ever seen someone that looked like Darnay before.
We can infer that it had something to do with their appearance.
And you could have mentioned that this is from "A Tale Of Two Cities"
When they get married they will aquire the last name of their partner
Answer:
The lesson learned by Bill and the narrator is best expressed by phrase "Crime does not pay."
Bill and the narrator Sam learn that kidnapping is neither beneficial to their health not financially lucrative.