Do you know that, on verbal, 45 is the 99th percentile? That's like scoring a perfect 51 on the quant. No school on the planet requires you to have that high of a verbal score - it's not necessary to score 45+ on verbal (or 51 on quant). For the very top schools, typically about 45 to 47+ is good enough on quant (depending on your quant background) and typically about 35 to 37+ is good enough on verbal.
Your practice CAT scores are in the mid-700s, higher than the average scores for every school out there, including Harvard and Stanford. Why are you looking for a higher score? There are some legitimate reasons why - one might be that you want to teach for us.
But if you are just trying to get a higher score because you think you need a higher score...you don't. You're good!* Go take the test!
*Note: this assumes that you took these practice CATs under 100% official conditions: essay, IR, 8m break, Quant, 8m break, Verbal. No unauthorized breaks, no pausing the test, etc.
At the stage that you're at, if you really are looking to go even higher, then your focus needs to be on two things:
(1) careless mistakes (not just on verbal - on quant, too)
(2) falling into traps on verbal
For #2, ask yourself:
1) why was the wrong answer so tempting? why did it look like it might be right? (be as explicit as possible; also, now you know this is not a good reason to pick an answer)
2) why was it actually wrong? what specific words indicate that it is wrong and how did I overlook those clues the first time?
3) why did the right answer seem wrong? what made it so tempting to cross off the right answer? why were those things actually okay; what was my error in thinking that they were wrong? (also, now you know that this is not a good reason to eliminate an answer)
4) why was it actually right?
Good luck!