We are now in the Fourth Industrial Revolution, due to the scientific technology's evolving     1     (rapid). Many of us are looking forward to seeing popular science fiction turn into a     2     (real) in the coming years. As is known to all, there have existed many great scientific inventions that are ready to go off the shelf. Either those that     3     (develop), or those that are in the process of designing. The imaginations we laugh at today will end up     4     (surprise) us in the future when they become real.

One of the most     5     (ambition) plans of China is to get 17 different countries to work for the idea of getting the western world linked to the eastern one via a high-speed rail line. We are not talking about connecting Eastern and Western China     6     train; we are talking about connecting London and Beijing. Another one is that the US might have created something     7     looks and sounds like a flying car,     8     (call) “flying Humvee”. But the rest of us still have to wait for this invention to turn up. Nevertheless, at least that should count as     9     achievement.

If you think there     10       (be) a great many other out- of-the-world inventions that are promising in the near future, please share them with us.