Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.
Over the last century, there have been many significant changes in the way we live. Obviously, it is difficult to ___(1)___ the life of ancient people and the life of the people living in the twenty- first century because so many changes have occurred. Even the changes that have ___(2)___ over the last ten years are amazing.
People in the past were not ___(3)___ to travel so long distance within such a short period of time. Nowadays, we have become very mobile. We have fast and comfortable cars. In addition, more and more people travel by plane. Moreover, in the past people had to work harder as they did not have ___(4)___ and machines to make their work easier.