670 (Q49 , v33)- How to get Q51, V39 +

Hi Experts

I scored 670 (Q49 , v33). Please advise how to
- get q51:
- get V 39 : My weakness : RC. How to improve CR and SC further?

Material Used: All OG's (excluding 13). GMAT club test for Maths and Maths notes from my friend.
For verbal e-gmat course.

Regards