【正文】 r cured them, much as storing in a barn cured the cultivated grasses. does the passage mainly discuss?(A) Western migration after the Civil War(B) The climate of the western United States(C) The raising of cattle (D) A type of wild vegetation can be inferred by the phrase Legend has it in line 1?(A) The story of the train may not be pletely factual.(B) Most history books include the story of the train.(C) The driver of the train invented the story.(D) The story of the train is similar to other ones from that time period. word they in line 5 refers to (A) plains(B) skeletons(C) oxen(D) Americans can be inferred about the Great American Desert mentioned in line 7?(A) It was not originally assumed to be a fertile area.(B) Many had settled there by the 186039。s.(C) It was a popular place to raise cattle before the Civil War.(D) It was not discovered until the late 180039。s. word barren in line 8 is closest in meaning to(A) lonely(B) dangerous(C) unfortable(D) infertile word preferred in line 8 is closest in meaning to(A) ordinary(B) available(C) required(D) favored of the following can be inferred about the cultivated grass mentioned in the second paragraph?(A) Cattle raised in the western United States refused to eat it.(B) It would probably not grow in the western United States.(C) It had to be imported into the United States.(D) It was difficult for cattle to digest. of the following was NOT one of the names given to the Western grasses?(A) Grama grass(B) Bluejoint grass(C) Buffalo grass(D) Mesquite grass of the following was NOT mentioned as a characteristic of western grasses?(A) They have tough stems(B) They are not affected by dry weather(C) They can be grown indoors.(D) They contain little moisture. word hard in line 19 is closest in meaning to(A) firm(B) severe(C) difficult(D) bitter to the passage, the cattle helped promote the growth of the wild grasses by(A) stepping on and pressing the seeds into the ground(B) naturally fertilizing the soil(C) continually moving from one grazing area to another(D) eating only small quantities of grassPassage 5(沒講)Certainly no creature in the sea is odder than the mon sea cucumber. All living creature, especially human beings, have their peculiarities, but everything about the little sea cucumber seems unusual. What else can be said about a bizarre animal that, Line among other eccentricities, eats mud, feeds almost continuously day and night but can live without eating for long periods, and can be poisonous but is considered supremely edible by gourmets?For some fifty million years, despite all its eccentricities, the sea cucumber has subsisted on its diet of mud. It is adaptable enough to live attached to rocks by its tube feet, under rocks in shallow water, or on the surface of mud flats. Common in cool water on both Atlantic and Pacific shores, it has the ability to suck up mud or sand and digest whatever nutrients are present.Sea cucumbers e in a variety of colors, ranging from black to reddishbrown to sandcolor and nearly white. One form even has vivid purple tentacles. Usually the creatures are cucumbershapedhence their nameand because they are typically rock inhabitants, this shape, bined with flexibility, enables them to squeeze into crevices where they are safe from predators and ocean currents.Although they have voracious appetites, eating day and night, sea cucumbers have the capacity to bee quiescent and live at a low metabolic ratefeeding sparingly or not at all for long periods, so that the marine organisms that provide their food have a chance to multiply. If it were not for this faculty, they would devour all the food available in a short time and would probably starve themselves out of existence.But the most spectacular thing about the sea cucumber is the way it defends itself. Its major enemies are fish and crabs, when attacked, it squirts all its internal organs into the water. It also casts off attached structures such as tentacles. The sea cucumberwill eviscerate and regenerate itself if it is attacked or even touched。 it will do the same if the surrounding water temperature is too high or if the water bees too polluted.1. What does the passage mainly discuss?(A) The reason for the sea cucumber39。s name(B) What makes the sea cucumber unusual(C) How to identify the sea cucumber(D) Places where the sea cucumber can be found2. In line 3, the word bizarre is closest in meaning to(A) odd(B) marine(C) simple(D) rare3. According to the Passage, why is the shape of sea cucumbers important?(A) It helps them to digest their food.(B) It helps them to protect themselves from danger.(C) It makes it easier for them to move through the mud.(D) It makes them attractive to fish.4. The words this faculty in line 20 refer to the sea cucumber39。s ability to(A) squeeze into crevices(B) devour all available food in a short time(C) suck up mud or sand(D) live at a low metabolic rate5. The fourth paragraph of the passage primarily discusses(A) the reproduction of sea cucumbers(B) the food sources of sea cucumbers (C) the eating habits of sea cucumbers(D) threats to sea cucumbers39。 existence6. The phrase casts off in line 24 is closest in meaning to(A) grows again(B) grabs(C) gets rid of(D) uses as a weapon7. Of all the characteristics of the sea cucumber, which of the following seems to fascinate the author most?(A) What it does when threatened(B) Where it lives(C) How it hides from predators(D) What it eats8. Compared with other sea creatures the sea cucumber is very(A) dangerous(B) intelligent(C) strange(D) fat9. What can be inferred about the defense mechanisms of the sea cucumber?(A) They are very sensitive to surrounding stimuli.(B) They are almost useless.(C) They require group cooperation.(D) They are similar to those of m