Let's go over the concepts in mathematics first. If you don't know the concept, you won't do the problem. Then you can choose the basic questions to practice. Good foundation, with a score of 120. What's more, our requirements are not so high. If you can't do the problem, you have to know what you think, so you can write it next time.
Chemistry and biology must be patiently and seriously recited, copied, recited and practiced to ensure that they can be recited. Physics, if you understand the concept and memorize the formula, you can still get extra points for writing the formula. Let's take the figures in and count them out, maybe we can get more points.
I just don't give up anyway. You still have room to work hard until the end of your volunteering. Come on!