In the last hundred years, traveling _____ (become) much easier and more comfortable. In the 19th century, it _____ (take) two o
r three months to cross North America by covered wagon. The trip _____ (be) very rough and often dangerous. The situation _____ (change) a great deal over the last century. Now you can fly from New York to Los Angeles in a matter of hours.
In the last hundred years, became much easier and more comfortable. In the 19th century, it took two or three months to cross North America by covered wagon. The trip was very rough and often dangerous. The situation changed a great deal over the last century. Now you can fly from New York to Los Angeles in a matter of hours.
Some problems that might occur is that you might forget some schedules, cause there is going to be several schedules, or you might forget something, etc.