I Choose the best answer (A, B, c or D).
      1.   ……………… may happen to you when you first come to a foreign country, but it won’t last long.
            A. culture shocks        B. cultural shocks        C. shock cultures         D. shock culturals
      2.   The scientists launch ……………… into the space so that they can send them necessary information for their research.
            A. flying sauces          B. buggy cars              C. astronauts               D. satellites
      3.   His family has encouraged him …………his dream of becoming a professional researcher.
            A. to fulfill                                                      B. fulfilling                
            C. to be fulfilled                                             D. to being fulfilled
      4.   He didn’t know why Pluto ………………as a “dwarf planet”.
            A. was reclassified                                          B. were reclassified
            C. had been reclassified                                  D. had reclassified
      5.   If parents ……………… to radiation, their children may possibly have birth defects.
            A. are exposed            B. is exposed              C. was exposed           D. were exposed
      6. Disneyland………… over 670 million visitors worldwide since it………… in 1995.
            A. attracted - opened                                      B. has attracted - opened
            C. has been attracted - was opened                D. were attracted - was opened
      7.   At this time next year, another spaceship ……………… into the space.
            A. will fly                    B. flies                         C. will be flying          D. is flying
      8.   The journalist wanted to know if she ……………... an appointment with you for a quick interview.
            A. can get                    B. can make                C. could get                D. could make.
      9.   The scientist said that his invention ……………. created for 3 month but it ……………. completed.
            A. was - hasn’t been                                       B. has been - hasn’t been
            C. had been - hadn’t been                               D. was - hasn’t been
      10. When I ………… with my friends on Facebook, the Internet ……………. suddenly.
            A. was chatting - disconnected                      B. chat - disconnected
            C. was chatting - was disconnected               D. chat - was disconnected
     11.  I am interested in natural science ………………. like Chemistry and Physics.
            A. subjects                  B. objects                    C. topics                      D. themes
      12. Steam engine has been known as a remarkable ………….. in science and technology.
            A. breakdown             B. break-up                 C. breakthrough          D. outbreak
      13. We will ………………. chips in the brain to control devices in the future.
            A. implant                   B. add                         C. include                    D. attach
      14. The ………………. of penicillin, one of the world’s first antibiotics, marks a true turning point in human history
            A. generation              B. exploration             C. invention                D. discovery
      15. The group of doctors has spent 8 months …......…. the side - effects of this new vaccine.
            A. having examined                                        B. to examine
            C. examining                                                   D. to have examined
      16. The doctor said that this disease ………………. prevented by vaccine.
            A. can                          B. can be                     C. could                      D. could be
      17. Her teacher told her that there ………….. still room for her improvement in her work.
            A. has been                 B. had been                 C. is                             D. was
      18. A mechanical calculator which could do additions or subtractions very quickly was ………………. by Little Pascal.
            A. found out               B. discovered              C. found                      D. invented
      19. Science and technology have  ………………. the life safe, secure and comfortable.
            A. transformed            B. made                       C. done                       D. changed
      20. Facebook was built on the ….............. of earlier social network sites like MySpace and Bebo.
            A. succeed                  B. successful               C. successfully            D. success