11. The ……………….of airplane is important because it has changed the way people travel and transport goods around the word.

A. invention            B. experiment                    C. explanation         D. benefit

12. Science and technology have enormous ………………..on economic development.

A. benefits              B. problems                       C. effects                D. pressure

13. In the future, robots will work in factories and ………………..our homes.

A. explore               B. clean                             C. develop               D. prevent

14. Advances technologies …………….a lot more benefits to human beings.

A. have                   B. carry                             C. help                    D. bring

15. What ………………are science and technology greatly changing nowadays?

A. fields                  B. factors                          C. things                 D. tasks

16. It is expected that even ……………people may travel into space on spaceships.

A. famous               B. ordinary                        C. intelligent           D. careful