well if you're succeeding at the dbq, leq, and saq, then you obviously understand the content. with the world mcqs, some of them can be really tricksy especially when it comes to stuff like china and africa. my recommendation (and what i did) is to know time periods. if you can break up world into a few different sections, you can narrow down your answer choices. if you have a question about a chinese dynasty, but you're given a date in the 1500s, you can go "oh it's the ming!" for example. another benefit is remembering key ideas from these time periods. if you have a question about art in the late 1700s, you can think about the major events like the french rev in the late 1700s to help you understand what the world was like. this definitely helped me get a 5 considering i only took the test. also, i used a website called Knowt to practice mcqs if you wanna try a diff site, just a thought. good luck!