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.
Trả lời câu hỏi dưới đây:
Made up of more than 150 member countries, the organization known as the United Nations were established after World War II to preserve international peace and security.
were sửa thành was vì " the organization" là danh từ số ít