1. Coffee is ___________ with scholars as it sharpens the mind rather than dulls it like alcohol. 2. _________ is the lamp of hope. Pessimism is the drug of sorrow. 3. As a 20-year-old college student, he is still quite childish in my eyes, but he calls himself a(n) ______ adult. 4. A good teacher is capable of interpreting a __________ theory with simple explanations. 5. Having lived in China for more than 10 years, the American couple is quite __________ with the Chinese culture. 6. The development of high-speed rail has greatly increased the ________ of the population in the past 10 years. 7. The Internet of Things (IOT) helps us get real-time data, __________ the needs of all in the connected world. 8. The universal availability of smart technologies has had an obvious _______ on almost every aspect of our life. 9. Betty graduated from a famous music college in New York. She could play the violin, the piano, the trumpet and many other __________. 10. With an enquiring mind, effective collaboration and arduous work, college students are able to __________ the public of their innovative and yet practical capabilities, and serve society in their way