Dưới đây là phần hoàn chỉnh đoạn văn trong bài tập bạn gửi (XI. Complete the passage):
"Man won’t fly for 50 years" said Wilbur Wright in 1901. (1) A. Before two years, he and his brother made the world’s first successful flight.
The future is difficult, but at the Singularity University in California you can actually study futurology. The University’s director is Ray Kurzweil, who predicts that (2) C. computer power will change the world dramatically. By 2045, we will probably be run by (3) B. intelligent computers — intelligent creatures on Earth, after computers.
These computers might think, communicate and (4) D. do things that ordinary humans won’t be able to understand them. But of course, if (5) D. people age too quickly, humans might not exist when everybody had microchips inside their brains.
Technology may also eradicate disease and increase life expectancy. If life expectancy increases (6) A. quickly so, this could cause other problems for the Earth!