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CollocationsComplete the sentences with suitable expressions from the collocation box. Sometimes more than one collocation is possible.Adj + route: direct, alternate, entire, main, same, newAdj + encounter: close, last, brief, final, initialEncounter + N: problem, difficulty, obstacleextend + N: life, length, range, scope, reach With the merging of the railroads, only the Union Pacific Railroad and the BNSF Railway remain to carry the______.