II. Complete the following sentences with the correct form of the words in the to the brackets. 1. They were very surprised when they knew his . (nation) 2. He is so to his community because he never misses an opportunity to help people. (activity) 3. In addition to hand gestures, facial also belongs to non-verbal communication. (express) 4. Despite the of chatting online, we will still be using face-to-face meetings to communicate with each other in the year 2050. (popular) 5. Some types of computer games can be _____________________. (educate) 6. Smartphones can vary from day to day due to new _____________________ by different companies in the world. (invent) 7. The _____________________ of a nuclear power plant costs a lot of money. (construct) 8. Space _____________________ brings about many benefits to science. (explore) 9. Life is become easy and _____________________ through science and technology. (comfort) 10. Nuclear waste is _____________________ for both humans and the environment. (harm) 11. As a _____________________ (science), Professor Tran Dai Nghia set an example as a true _________ (research) who devoted himself to the ____________(science) career. 12. The key to YouTube’s success is the _____________________ for anyone from anywhere in the world to broadcast themselves for free. (able) 13. Global communication was changed by the of the Internet. (invent) 14. Annually the competition attracts millions of worldwide. (view) 15. The Internet is a very useful means of . (communicate)