The answers are:
1. the phrase Winston repeatedly writes in his diary while unaware that he is writing it is:
B. Down with Big Brother.
2. Winston is shocked and troubled to see the phrase "Down with Big Brother" written repeatedly in his diary because:
D. He is afraid the words are visible to the telescreen.
3. Before Winston meets Julia, he fears and hates her because:
B. He thinks she hates Big Brother.
4. Winston's job at the Ministry of Truth requires him to
B. spy on coworkers, work that makes him proud