Based on the clue '7 priests of the congregation of holy cross are on...', what is the answer?

What is associated with: 7 of this rivers more than 1000 known tributaries exceed 1000 miles in length? Based on the clue '7 plus 1 completes the need', what is the answer? What is associated with: 7 policeman were killed in 1886 when police tried to break up a workers meeting in this square? Based on the clue '7 presidents have lain in state nixon gave his fa...', what is the answer? Based on the clue '7 seals 7 trumpets satan gets his dont add s to th...', what is the answer? What is associated with: 7 time nascar national champion died in last lap crash at the 2001 daytona 500? Based on the clue '7 to approve a candidate or sign the back of a che...', what is the answer? What is associated with: 7 weeks after the alamo sam houston took this mexican leader prisoner at the 1836 battle of sa…