Keep getting 2 of 3 right on 3 word blanks

I keep getting 2 out of 3 words right for the 3 word blanks! any idea/helpful tips to try to get the final word? it happens every time and is becoming frustrating!

May be getting test taking strategies down better - have you tried mastering the tools that Greg teaches (math strategy, time contrast, block of 4, previously referenced)? If so, it should be simple to solve