Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks. 

MODERN SCIENCE

It seems entirely (1) ____ to us that there are teams of scientists in universities and (2) ____ institutions around the world, attempting to (3) ____ the way the world works. However, it hasn't always been that (4) ____. Although the scientific method is now four or five hundred years old, the ancient Greeks, for example, believed that they could work out the (5) ____ of natural events just by the power of thought. During the 17^th century, more and more people began to realize that they could (6) ____ their scientific ideas by designing a relevant (7) ____ and seeing what happened. A lot of (8) ____ was made in this way by individual scientists. These men and women often worked alone, carrying out (9) ____ into many different areas of science, and they often received very little (10) ____ for their hard work. At the start of the 20^th century, though, it became clear that science was becoming more complicated and more expensive. This individual scientist disappeared, to be replaced by highly qualified teams of experts. Modern science was born. 

(1) ...................

• A. 
  natural
• B. 
  physical
• C. 
  unreal
• D. 
  typical