3 weeks is not less time if u r really determined to boost up ur verbal score. Dont wast time studying trivia now, just pick up OG 11 or OG 10. There are 400 verbal que is OG11th. If u read them through and analyse well they r REALLY more than enough. do 10-14 que in each section SC, RC, and CR in addition to ur regular math prep. attack every question as if u must get it correct. Dont bother abt time u r taking to each question in first week. If ur ans is wrong do as much analysis possible. in a week u will see difference. Also as u practice questions from all sections everyday (SC, CR, RC) u never feel like left behind. All the best