阅读理解。 Once there were two brothers who were twins. They looked exactly alike. They both had the same dark brown hair, blue eyes and beautiful teeth. They were both 5'10' tall and both weighed 150 pounds. They not only looked alike but also sounded alike on the telephone.  Not even their family could tell the difference. They dressed alike, listened to the same music, and read the same books. They even laughed at the same jokes. When they were twenty-three ,they both got married and a year later both had sons. The years went by and as they began to grow old, they both wore glasses and finally they both became bald (秃头的). Then one day, one of the brothers got sick  and died. A few days later a man stopped the other twin on the street. “Excuse me for asking,” he said, “but was it you or your brother who died?” l. It was not easy to tell the two men from each other because _________. A. they were brothers B. they were handsome C. they were at the same age D. they were twins 2. The twin brothers ______. A. looked very much alike B. had different colored hair C. looked like movie stars D. wore different clothes 3. Th ey both became bald means ___. A. they became o ld B. they had sons C. they had little hair D. they got sick 4.The only difference between the twins was ________. A. one was shorter than the other B. one got sick and died C. one got married and had a son D. one was bald and the other wasn't 5. The man stopped the other twin on the street because______. A. he wanted to talk with him B. he didn't know which of them died C. he wanted to make friends with him D. he was surprised to see him on the street