Choose the correct answer A, B, C or D to complete the sentences

V. Choose the correct answer A, B, C or D to complete the sentences.

1. Facebook was built on the ………of earlier social network sites like MySpace and Bebo.

A. succeed            B. successful                  C. successfully     D. Success

2. Little Pascal ……a mechanical calculator which could do additions or subtractions very quickly.

A. discovered       B. found               C. found out          D. invented

3. Many people believe that robots have made workers jobless………that is not necessarily true.

A. but                   B. and                            C. so                     D. or

4. Recent ………developments have made robots more user-friendly and intelligent.

A. science             B. scientist            C. scientific           D. scientifically

5. Teenagers spend most of their time playing computer games, ………they lost their interests in daily activities.    

A. moreover          B. so                     C. however           D. as a result

8. Science and technology have ………the life safe, secure and comfortable.

A. transformed      B. made                C. done                 D. Changed