I
Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction.
Trả lời câu hỏi dưới đây:
A professor of economy and history at our university developed a new theory of the relationship between historical events and financial crises.
Đáp án là D => economy ---> economics . economy: nền kinh tế, còn economics: môn kinh tế