Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.
A professor of economy and history at our university developed a new theory ofthe relationship between historical events and financial crises.
Giải chi tiết:
economy [ nền kinh tế ] => economics [ ngành kinh tế học]
Biogas can be utilized for electricity production, cooking, space heating, water heating and process heating.
Population growth rates vary among regions and even among countries within the same region.