One of the best-known 1) ...... of parallels is between the careers of Abraham Lincoln and John F. Kennedy. Both were 2) ...... on a Friday, in the 3) ...... of their wives; both were succeeded by a Southerner named Johnson; both their killers were themselves killed before they could be brought to 4) ....... Lincoln had a secretary called Kennedy; Kennedy a secretary called Lincoln. Lincoln was killed in the Ford 5) ......; Kennedy met his death while riding in a Lincoln convertible made by the Ford Motor Company — and so on. Similar coincidences often 6) ...... between twins. A news story fromFinlandreported of two 70-year-old twin brothers dying two hours apart in separate accidents, with both being hit by trucks while crossing the same road on bicycles. According to the police, the second 7) could not have known about his brother’s death, as officers had only 8) the first victim minutes before the second accident. Connections are also found between identical twins who have been separated at birth. Dorothy Lowe and Bridget Harrison were separated in 1945, and did not meet until 1979, when they were flown over fromBritainfor an investigation by a psychologist at the University of Minnesota. They found that when they met they were both wearing seven rings on their hands, two bracelets on one wrist, a watch and a bracelet on the other. They married on the same day, had worn 9)....... and carried the same flowers. Dorothy had named her son Richard Andrew and her daughter Catherine Louise; Bridget had named her son Andrew Richard and her daughter Karen Louise. In fact, she had wanted to call her Catherine. Both had a cat called Tiger. They also had a string of similar mannerisms (习惯性的举止) when they were nervous. How can we 10) ?