giúp tớ 3 câu tn thui ạ, cảm ơn nhé 12: One of my best friends were awarded a full scholarship to Harvard, which is one of the most prestigious universities in the world. A. to                               B. were          C. which               D. universities 13. Thousands dollars were not enough for the patients with Covid 19- SARS- CoV-2 in Viet Nam. A. were         B. Thousands        C. victims          D. enough 25: If they were not in a hurry, they might pick you up. A. Unless they had enough time, they might pick you up. B. Unless they had not enough time, they might pick you up. C. Unless they didn’t hurry, they might pick you up. D. Unless they were in a hurry, they might pick you up.