Mark the letter A, B, C, or D to indicate the sentence that is best written from the words/phrases given.
36. he/improve/his spelling/he/not get/good grades
A. He improves his spelling, so he won't get good grades.
B. If he improves his spelling, he won't get good grades.
C. He improved his spelling because he doesn't get good grades.
D. Unless he improves his spelling, he won't get good grades.
