29. The passage informs us that. A) the Panama Canal built between the Atlantic and Pacific Oceans is less than 55 miles
B) high costs and politics were the only obstacles to construct the canal.
C) all diseases have been combatted since the construction of the canal
D) it took much more than four decades to build the Panama Canal.
30. Which of the statements is true according to the passage? The Panama Canal... A) didn't succeed in cutting down the route between the Atlantic and Pacific Oceans much.
B) reduced the distance between the Atlantic and Pacific Oceans
C) has been officially opened only for travelers
D) makes it impossible to cover seven thousand miles in eight hours.