1. The law of universal gravitation / to discover
a) am discovered
b) was discovered
c) was discover

2. The phonograph and light bulb / to invent /by Thomas Edison
a) were invent
b) were invented
c) was invented
3. Prototypes of the helicopter, glider, and military tank /to design/by
Leonardo da Vinci
a) is design
b) was designed
c) were designed
4. The first astronomical telescope / to construct / by Galileo Galilei
a) was constructed
b) were constructed
c) are constructed

5. The theory of relativity/ to develop / by Albert Einstein
a) are develop
b) was developed
c) were developed

6. The formula for the volume of a sphere/ to discover / by Archimedes
a) was discover
b) were discover
c) was discovered

7. Coffee / to grow /in more then fifty counties around the world.
a) is growed
b) is grow
c) is grown

8. Computers / to use / by millions of people.
a) are use
b) are used

c) used

9. Thousands of calls / to make / from mobile phones every day.
a) are make
b) is make
c) are made

10. Stars / to see / in the sky at night
a) are seen
b) is seen
c) are see

11. The Tower of London /to visit/ by thousands of tourists every year.
a) is visit
b) is visited
c) are visit

12. Oil / to make / of seeds.
a) are made
b) is made
c) is make