All of the following presidents were assassinated EXCEPT _______

* Hướng dẫn giải

B – Dòng thứ 13, đoạn thứ 3. “Franklin D. Roosevelt was elected four times (1932, 1936, 1940 and 1944), the only man to serve so long a term. He had contracted polio in 1921 and eventually died of the illness in 1945.”