I'm not sure what your answer choices are, but when Winston gets the note he is shocked. He finds it difficult to concentrate. He wants to fight to stay alive, and he begins fantasizing about ways he could meet the girl, but grows fearful he may lose her, so when he destroys it; it shows that in Oceania love is not tolerated. Romantic relationships are not encouraged, they are seen as a disgusting act, and are forbidden by the Party.
I hope this helps :) good luck!