Question

   There is a fish called the black spot angelfish,which can change from female (雌性) to male (雄性) . No,it cannot do it by simply wishing to become male. The change happens for a specific reason.

   The angelfish live in groups. And each group has one male fish,which is blue in color,and four female fish,which are yellow in color.

   The male angelfish is the strongest and largest member of the group. He is the one who protects and looks after the females and acts like their “safety guard”. When the male dies,the group needs a “safety guard”. This is when the largest female fish in the group begins to change its appearance.

   She begins to grow larger in size. After a week,she starts changing color,from yellow to blue. Slowly? the changes take place. She begins behaving like a male. Two weeks later,black spots appear on her body. This shows that the change is complete. She is now completely male!

   Another interesting fact about angelfish is that they make a special living in the fish world. Most of them act as “cleaners” for other fish. They pick parasites (寄生生物) and dead things from the body of other fish.

() 1. There are fish in the group of angellish.

   A. 2   B. 3   C. 4   D. 5

() 2. The male angelfish is the member of the group.

   A. strongest   B. largest

   C. biggest   D. strongest and largest

() 3. It takes angelfish week(s) to change from the female to the male fish.

   A. one   B. two   C. three   D. four

() 4. The angelfish feed on .

   A. grass   B. parasites

   C. dead things   D. parasites and dead things

Answer 1

1. D 2. D 3. D 4. D

閱讀提示：本文介紹了一種變性魚，它們過群居生活，當(dāng)唯一的雄性魚死去的時候，群里最大的雌性就會變?yōu)樾坌�，它們以其他魚身上的寄生物和壞死東西為食。

1. D細(xì)節(jié)理解題。由第二段中的第二句“And each group has one male fish,which is blue in color,and four female fish,which are yellow in color.”可知答案為 D.

2. D細(xì)節(jié)理解題。由第三段中的第一句“The male angelfish is the strongest and largest member of the group. ”可知答案為 D.

3. D細(xì)節(jié)理解題。由第四段中的第二、三句話可知，變性魚完成變 性的過程需要三周的時間。可知答案為C.

4. D細(xì)節(jié)理解題。由最后一段中的最后一句“They pick parasites (寄生生物) and dead things from the body of other fish. ”可知答案 為D.