20 10 Lanzhou Senior High School Entrance Examination English Reading Comprehension 62 is entitled What answer is not C?

C is obviously wrong, but A seems to be wrong, and the answer is obviously D, because then the world began to change in the early days of 1800s. There are few unknown lands in the world. People don't need to explore too many things. About. It shows that people don't have to start exploring from 1800. By this time, most people in developed countries have lived a very good life. Of course, new inventions continue. But now human beings have desires. Explore again. It shows that after 1960S, people once again triggered a wave of exploration, and the sentence you quoted just shows that people began to explore again from 1960.