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　　272. One of the best-known examples of mass extinction occurred 65 million  years ago with the demise of dinosaurs and many other forms of life.

　　The word "demise" is closest in meaning to which of following?

　　(A) change

　　(B) recovery

　　(C) help

　　(D) death

　　273. One interesting, and controversial, finding is that extinctions during  the past 250 million years have tended to be more intense every 26 million  years.

　　The word "finding" is closest in meaning to which of following?

　　(A) published information

　　(B) research method

　　(C) ongoing experiment

　　(D) scientific discovery

　　274. Even the name is an epithet, a synonym for the stunted, the scruffy,  the insignificant, what is beautiful about such a place?

　　The word "insignificant" is closest in meaning to which of following?

　　(A) unimportant

　　(B) undisturbed

　　(C) immature

　　(D) inappropriate

　　275. Potter, for instance, found it convenient to locate their workshops  near their source of clay, regardless of its relation to the center of  settlement.

　　The phrase "regardless of" is closest in meaning to which of following?

　　(A) as a result of

　　(B) no matter what

　　(C) proud of

　　(D) according to

　　276. The techniques of pottery manufacture had evolved well before the  toeflek period, but marked stylistic developments occurred in shape and in  decoration, for example, in the interplay of black and other glazes with the red  surface of the fired pot.

　　The word "marked" is closest in meaning to which of following?

　　(A) original

　　(B) attractive

　　(C) noticeable

　　(D) patterned

　　277. The broad utility of terra-cotta was such that workers in clay could  generally afford to confine themselves to either decorated ware and house wares  like cooking pots and storage jars or building materials like roof tiles and  drainpipes.

　　The word "confine" is closest in meaning to which of following?

　　(A) adapt

　　(B) train

　　(C) restrict

　　(D) organize

　　278. Some sixth-and fifth-century B. C. Athenian pottery establishments are  known to have concentrated on a limited range of fine ware, but a rural pottery  establishment on the island of Thasos produced many types of pottery and roof  tiles too, presumably to meet local demand.

　　The word "presumably" is closest in meaning to which of following?

　　(A) frequently

　　(B) practically

　　(C) preferably

　　(D) probably

　　279. The expense of moving a family to the ever-receding frontier exceeded  the means of many, and the cost of tools draft animals, a wagon, a well,  fencing, and of building the simplest house, might come to$1,000---a formidable  barrier.

　　The word "formidable" is closest in meaning to which of following?

　　(A) obvious

　　(B) predictable

　　(C) difficult

　　(D) manageable

　　280. Homesteaders usually came from districts not far removed from frontier  conditions. And despite the intent of the law, speculators often managed to  obtain large tracts.

　　The word "intent" is closest in meaning to which of following?

　　(A) purpose

　　(B) power

　　(C) effect

　　(D) invention

　　281. The smooth operation of an ant colony depends on ten to twenty  different signals, most of which are pheromones(chemical signals triggering  behavioral responses) .

　　The phrase "smooth operation" is closest in meaning to which of  following?

　　(A) daily activity

　　(B) effective functioning

　　(C) delicate balance

　　(D) permanent location

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