This monument is incredible!
Answer: The right answer is actually "no estudies."
Explanation: Just to elaborate a little on the answer, it can be added that in this exercise they are asking you to conjugate the so-called imperative mood, which primarily expresses a command, an appeal, or a plea. The negative command of the verb "estudiar" (to study) in the second person singular is "no estudies" and it can be translated as "do not study."
check out Quizlet. they usually have each module on there, previous students that used it or wanted to help others out. you'll notice they pop up when u copy paste things too. u may have to do some fishing to find the one best suited for u but they're there, promise. also look up spanish conjugation charts on Google/Google Images. that's what helped me pass both 1/2