Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each question.
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 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. It 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 cucumber will eviscerate and regenerate itself if it is attacked or even touched; it will do the same if surrounding water temperature is too high or if the water becomes too polluted.
The words “this faculty” refers to the sea cucumber’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 rate
D
Từ “ this faculty” ám chỉ đến khả năng của hải sâm ...
A. chui vào đường nứt
B. tiêu thụ tất cả những thức ăn có sẵn trong thời gian ngắn
C. hút bùn hay cát
D. sống ở mật độ trao đổi chất thấp
Dẫn chứng: 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 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.
[ Mặc dù chúng là loài ăn tạp, ăn cả ngày và đêm, hải sâm có khả năng trở nên yên lặng và ở vùng mật độ thức ăn thấp hoặc không có tí thức ăn nào suốt khoảng thời gian dài để mà những động vật ở đáy đại dương là thức ăn của chúng có cơ hội sinh sôi nảy nở. Nếu nó không có khả năng này, chúng sẽ tiêu thụ hết tất cả những thức ăn có sẵn trong thời gian ngắn và sẽ chết đói]