מישהו יכול לבדוק ולהגיד האם יש טעות? (אנגלית)

We had 5 quizzes until now. I got 75,93,95,0,0 which means my average is 52.
I missed 2 quizzes.The 2 0 from the last quizzes ruined my whole grade. Except of the test we have next week, is there anything I can do to improve my final grade?