Verbal | Advise for 670 to 720 in a month.Verbal guidance

I took my first GMAT prep test last week and scored 670 ( Q49 V31 ).
I took the test in an uncontrolled environment,skipping IR and AWA.Here are my personal analysis of strengts and weaknesses.
- Good at CR : scoring rate of 75% from OG with time constraints
- Quant is strong but need to build speed.
- Bad at RC and SC . Scoring rate 40% from OG with time constraints
*RC : can't retain the passage,end up spending a lot of time ,have to go back to the passage for answers.Still can't be sure of answer
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