Help!!!! With.critical reading

<p>Ive taken the sat three times and the highest ive ever gotten in the critical reading is a.600!! Ive been trying to pay strict attention to the passages and ive been studying vocabulary words for three years so I know the sentence completion isn't the problem. Can anyone please give me some feedback on what.I must do to increase by score to atleast 650? Thank you so much!!</p>