在英语越来越普及的今天，学好英语成了大学生的首要学习目标。为了帮助大家顺利通过英语考试。特收集以下题目：
Certainly no creature in the sea is odder than the common 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, 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 come in a variety of colors, ranging from black to reddish?brown to sand?color and nearly white. One form even has vivid purple tentacles. Usually the creatures are cucumber?shaped—hence their name—and because they are typically rock inhabitants, this shape, combined 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 become quiescent and live at a low metabolic rate—feeding sparingly or not at all for long periods, so that the marine organisms that provid 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 water. It also casts off attached structures such as tentacles. The sea cucumber will 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 becomes too polluted.
1. 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.
2. 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 cucumbers’ existence
3. What can be inferred about the defence 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 most sea creatures.
4. Which of the following would NOT cause a sea cucumber to release its internal organs into the water?
A. A touch. B. Food.
C. Unusually warm water. D. Pollution.
谜底及解析
1. B)经由过程阅读文章可以解除选项A、C、D，因为文中没有说起，故选项B为正确谜底。
2. C)此题为段落大旨题。经由过程阅读第四段可知作者都是讲述海参的进食习惯，故选项C为正确谜底。
3. A)此题为推论题。按照最后一段可知海参在受到外界刺激时，会做出必然的反映，这也反映出它的防御机制很是敏感，故A为正确谜底。
4. B)此题为细节题。按照最后一段可知惟有food不会使海参将体内器官吐出来，故其为正确谜底。