【正文】 e following is true about termites? A. They are a kind of ant, but they are unlike most ants in many ways. B. They form colonies that grow at first and then gradually decline. C. Their workers are all males, and their soldiers are all females. D. They go through a life state called the nymph stage. 3. According to paragraph 2, termites need to live in nests with high humidity in order to A. keep their food moist B. withstand cold temperatures in winter C. protect their bodies from drying out D. keep nest temperatures high 4. The word “attain” in the passage is closet in meaning to A. achieve B. observe C. overe D. reflect 5. The word “ingenious” in the passage is closest in meaning to A. determined B. clever C. ambitious D. successful 6. The word “Renowned” in the passage is closest in meaning to A. Skilled B. Famous C. Early D. Revolutionary 7. According to paragraph 3, the nests of some tropical termite species have the ability to A. insulate the microclimate in one part of the nest from the microclimate in another part B. Allow moist outside air to get inside regardless of whether it is warm or cool C. rapidly decrease the humidity inside when it gets hot outside D. Provide the oxygen needed in the nest 8. According to paragraphs 3 and 4, all of the following are true of the nests of Macroternes natalensis EXCEPT: A. The walls are built out of soil mixed with termite saliva. B. The nests can be as tall as they are wide at the base. C. The interior of the nest is kept as humid as possible. D. The termites use hollow, thinwalled ridges to travel from one part of the nest to another. 9. According to paragraph 4, how does the fungus grown by Macrotermes natalensis affect the environment of the nest? A. It carries water up from the soil into the interior. B. It dries the air by using up moisture as it grows. C. It heats and adds humidity to the inside of the nest. D. It lessens the effects of the metabolism of so many termites. 10. According to paragraph 5, what does the thinness of the ridge walls make possible? A. The concentration of cool air in the cellar B. The construction of exceptionally long tunnels C. The even distribution of oxygen from attic to cellar D. The diffusion of gases into and out of the ridges 11. According to paragraph 5, what happens to the air in the ridge tunnels of Macrotermes natalensis nests? A. It bees more humid as water vapor diffuses into the tunnels. B. It loses carbon dioxide and gains oxygen. C. It reaches the interior of the nest through pores in the walls. D. It moves in the same direction as the air in the center of the nest. 12. Paragraph 5 supports which of the following about the air that flows through the interior of a Macrotermes natalensis mound? A. It has a higher concentration of oxygen in the cellar than in the attic. B. It is the same temperature as the air on the outside of the mound. C. It contains over 250 quarts of oxygen which circulate continuously. D. It is most humid in the cellar and gradually loses moisture as it rises to the attic. 13. Look at the four squares [■] that indicate where the following sentence could be added to the passage. If not through the walls or its pores, how does oxygen enter the nest at all, since the nest has a closed surface? Where would the sentence best fit? Click on a square [■] to add the sentence to the passage.14. Directions: An introductory sentence for a brief summary of the passage is provided the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 3 points. Termites are social insects that live in large, often elaborately constructed nests. ●●●Answer ChoicesA. Although termites resemble ants in terms of size, metarmorphosis, and social organization, they actually belong to a different order of insects. B. Some termites build their nests underground, while other construct aboveground structures with thick, insulating wall. C. Some termite species grow a fungus in their nests so that it will purify the air by taking in carbon dioxide and giving off oxygen. D. Termites are sensitive to dryness and to changes in temperature, so their nests are designed to minimize these factors. E. Whether they lie above ground or below ground, termite nests must include special pores that allow air to enter the nests. F. The nests of Macrotermes natalensis consist of a series of chambers and tunnels that allow for the circulation of air and the exchange of oxygen and carbon dioxide.Coral ReefsAn important environment that is more or less totally restricted to the intertropical zone is the coral reef. Coral reefs are found where the ocean water temperature is not less than 21 176。 and he saw that they were related to each other in a logical and gradational sequence. A fringing reef is one that lies close to the shore of some continent or island. Its surface forms an uneven and rather rough platform around the coast, about the level of low water, and its outer edge slopes downwards into the sea. Between the fringing reef and the land there is sometimes a small channel or lagoon. When the lagoon is wide and deep and the reef lies at some distance from the shore and rises from deep water it is called a barrier reef. An atoll is a reef in the form of a ring or horseshoe with a lagoon in the center.Darwin’s theory was that the succession from one coral reef type to anoth