31. One can conclude from the passage that before the Panama Canal opened,...
A) there was another route from the Atlantic to the Pacific Ocean, but a rather long one.
B) ships could travel from the Atlantic to the Pacific Ocean every eight hour
C) fifteen thousand ships transported travelers around Cape Horn every year.
D) if anyone wanted to undertake the journey by ship from the Atlantic to the Pacific Ocean it wouldn't take longer.
32. The word “hazardous” in the passage is opposite in meaning to ...
A) dangerous B) safe C) perilous D) slow
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