I think this is right but I'm not sure but I'll try my best
1) D because cunning refers to skill in deceit and trickery, and telling a convincing lie is the only option that involves both skill and deceit.
2) D because to speak to somebody in confidence means that you want to be confident that the information shared is between the group you share confidence with. Nurse wishes to speak to Romeo in confidence that he will not tell anybody because it is a secret and she wishes only for Romeo to know.
3) B because to counter something means to go against that thing. An example is a counter-argument, or an argument against another argument.
4) B because that is the act <em>against</em> someone. All the other options demonstrate a command, but not a <em>countermand, </em>if you get my gist.
5) A (i think) because the decision to get married was an unwise and hasty decision made of young lust, and ulimately caused the great tragedy. If Romeo and Juliet had taken things slower, things might've been possible renegotiated or at least thought over.
6) B because Friar Lawrence is really Romeo's 'father figure' because his father is so often absent in his life. He acts as a mentor and tries to help Romeo get married to his love.