Verbal | Experiencing huge variation in sectional scores

Hi

I am in the last leg of GMAT preparation where i am just giving mocks every week and analyzing the same. I have my GMAT scheduled for mid October and i am targeting a score of 700+. However the verbal section is really affecting my performance in mocks. Now the issue is that i am experiencing variations in the sectional performance i.e. at times my sc accuracy is 70-80% but in other cases it also goes down to 40-50. Also CR is experiencing a little variation with 60-70 to 40-50. RC at one point
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