4. For each blank select one entry from the corresponding column of choices. Fill all blanks in the way that best completes the text.
It is refreshing to read a book about our planet by an author who does not allow facts to be (i)__________ by politics: well aware of the political disputes about the effects of human activities on climate and biodiversity, this author does not permit them to (ii)__________ his comprehensive description of what we know about our biosphere. He emphasizes the enormous gaps in our knowledge, the sparseness of our observations, and the (iii)__________, calling attention to the many aspects of planetary evolution that must be better understood before we can accurately diagnose the condition of our planet.
- 1(i) overshadowed

- 2(i) invalidated

- 3(i) illuminated

- 4(ii) enhance

- 5(ii) obscure

- 6(ii) underscore

- 7(iii) plausibility of our hypotheses

- 8(iii) certainty of our entitlement

- 9(iii) superficiality of our theories
