English
posted by rfvv .
1. I am busy studying for the midterm exam.
2. I am busy studying for the midterm exam.
3. I am busy studying for the midterm exams.
4. I am busy studying for the midterm exams.
(Here in our country, During the period of the midterm exam(s), students have tests for all the subjects, about 10 subjects. So they have to prepare for all the tests. In this case which expressions are grammatical?)

English 
Writeacher
3 and 4 are the same and are correct for the multipleexams situation you described.
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