The word it in the passage refers to
A. host
B. organism
C. parasite
D. relationship
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Which of the sentences below best expresses the information in the highlighted statement in the passage？ The other choices change the meaning or leave out important information.
A. Mesopotamian and Egyptian civilizations exhibit the majority of the characteristics identified by historians.
B. The characteristics that historians have identified are not found in the Egyptian and Mesopotamian cultures.
Civilizations in Mesopotamia and Egypt were identified by historians who were studying the characteristics of early cultures.
D. The identification of most historical civilizations includes either Egypt or Mesopotamia on the list.
According to the text, the WTO
A. is in favour of national cultural products.
B. is harmful to cultural diversity.
C. is to ensure the survival of cultural diversity.
D. is to make decisions on culture.
Why does the author mention Neolithic towns in paragraph 2？
A. To give an example of a civilization
B. To explain the invention of writing systems
C. To argue that they should be classified as villages
D. To contrast them with the civilizations that evolved
Which of the sentences below best expresses the information in the highlighted statement in the passage？ The other choices change the meaning or leave out important information.
A parasite is less likely to destroy the host when it attaches itself at first.
B. Parasites that have lived on a host for a long time have probably done a lot of damage.
C. The most destructive phase for a host is when the parasite first invades it.
D. The relationship between a parasite and a host will evolve over time.
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