Please offer some tips for TC

Hey,
I have my GRE exam in a month, and I’m really struggling with Text Completion (TC) questions. I’ve been practicing every day using the Big Book, but I don’t feel like I’m getting any better. I’ll keep practicing in the hopes of improving, though.

The main issue I face is that, while I can often get the connotation right, I have trouble choosing the correct word or phrase to fit the sentence (semantics). Sometimes, I also struggle to understand what the sentence is trying to convey.

Do you have any advice on how I can improve?

Can you show an example of such a question?