Question

neither you nor your sister should ____ to them​

Answer 1

Answer:

neither you nor your sister talk to them

Answer 2

Neither you nor your sister should talk to them.

Detailed answer

Talk is the most appropriate word to be used at this moment.

• The sentence now denotes that the person is telling the brother and sister not to speak or interact with the other person.
• Talk is the most grammatically correct word to be used here.
• Any other word may create a grammatically incorrect word and incorrect sentence.