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Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
The number of students attending English courses at our university was increasing every year
A. students
B. attending
C. at
D. was
The number of students attending English courses at our university was increasing every year
A. students
B. attending
C. at
D. was
Sửa was thành is (every year)
Đáp án D.