It seems entirely (1) ... to us that there are teams of scientists in universities and other institutions around the world, attempting to (2) ... the way the world works. However, it hasn’t always been that (3) ... Although the scientific method is now four or five hundred years old, the ancient Greeks, for example, believed that they could work out the (4) ... of natural events just by the power of thought. During the 17th century, more and more people began to realize that they could (5) ... their scientific ideas by designing a relevant (6) ... and seeing what happened. A lot of (7) ... was made in this way by individual scientists. These men and women often work alone, carrying out (8) ... into many different areas of science, and they often received very little (9) ... for their hard work. At the start of the 20th century, though, it became (10) ... that science was becoming more complicated and more expensive. The individual scientist disappeared, to be replaced by highly qualified teams of experts. Modern science was born. 1 A physical B natural C typical D real 2 A create B invent C construct D discover 3 A route B method C way D technique 4 A aims B reasons C causes D impulses 5 A calculate B estimate C measure D test 6 A experiment B research C attempt D analysis 7 A development B movement C progress D evolution 8 A research B experiment C discovery D education 9 A award B prize C gift D reward 10 A clear B true C accurate D actual

D real
The phrase "entirely real" makes the most sense in this context, emphasizing the tangible, actual nature of the scientific teams around the world.

D discover
"Discover" is the correct word here because scientists are trying to uncover or find out how the world works, rather than create, invent, or construct it.

C way
"Way" is the most appropriate choice as it refers to the method or manner in which science has progressed, making the statement sound more natural and fitting.

C causes
The ancient Greeks were attempting to understand the causes of natural events, rather than their reasons or aims. "Causes" refers to the underlying reasons behind phenomena.

D test
Scientists test their ideas by conducting experiments. "Test" fits best here as it involves the scientific method of experimentation.

A experiment
A scientific "experiment" is the correct term because it refers to a controlled process used to test hypotheses and ideas in science.

C progress
"Progress" makes the most sense because it refers to advancements or developments in science that were achieved over time through experimentation.

A research
Scientists conduct research to explore different areas of science. "Research" is the most fitting word here as it aligns with the investigative process.

D reward
Scientists often receive little reward for their hard work. "Reward" best fits this context, referring to recognition or compensation for their efforts.

A clear
By the start of the 20th century, it became clear that science was becoming more complicated. "Clear" means it became evident or obvious, making it the best choice for this sentence.