Hi,
well since you have your test next week , I won't advice you to study/ memorize any new material because even though you might learn something new you may not be able to apply it under timed conditions in such a short time.
If you analyse your Mgmt mocks I am sure there will be a pattern to the questions you get wrong, they could be from the same topic/s or your making the same mistake in that you are unable to recognize subtle changes in meaning or modifier placement, etc.
Please try to find that and work on those questions ie reviewing the concepts again if need be and finding out why did you find the incorrect answers appealing, what logic are you missing etc.
Most commonly tested topics in SC are meaning, parallelism , S-V agreement,and modifiers. This week should be dedicated to a over all review and only official problems. All the best.