Higher education is very importance to national economies and it is also a source23/50Mark 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. Higher education is very importance to national economies and it is also a source of trained and educated personnel for the whole country importance economies educated the whole countryGiải thíchĐáp án A Importance → important vì sau động từ “be” dùng tính từ