B
①Last September, my family visited a turtle center in Kemaman, Malaysia. It is famous for its clear beach and it is the home to the green and Hawksbill turtles. The center saves them by keeping their eggs safe and helping the baby turtles back to the sea safely.
②When we arrived at the center, we met the workers. One of them told us a sad story. He found a nest with about 100 turtles' eggs in it, but they didn't hatch(孵化) because of a deadly fungus. Sadly, there is also another danger to the turtles' eggs from the ghost crabs. Because the ghost crabs love to eat turtles' eggs. Besides, some eggs don't develop properly. When such an egg hatches, the turtle even has two heads! These turtles have problems living in the world.
③Later, the worker showed us the turtle eggs in the hatchery. That day, we saw some baby turtles hatch from their eggs. It was amazing to watch them break out of their shells and start crawling(爬).
④As night fell, the worker took the baby turtles to the beach. They used the red lights to help us see the turtles better. Turtles can't see the red light very well. So it wouldn't affect them very much. The baby turtles moved quickly as they ran into the dark sea. Welcome to the start of your long journey into the wild, little turtles!
()19. How many dangers in Para. 2 does the writer mention(提及) to the turtles' eggs?
A. 2.
B. 3.
C. 4.
D. 5.
()20. What does "it" in Para. 4 refer to(指代)?
A. The sea.
B. The red light.
C. The worker.
D. The baby turtle.
()21. Which is the right order of the writer's activities?
①The writer watched the baby turtles crawl to the sea.
②A worker told the writer a sad story about the turtle eggs.
③The writer saw the baby turtles hatch from eggs.
④The writer arrived at the turtle center in Kemaman.
A. ②④③①
B. ④③②①
C. ②①④③
D. ④②③①

19. B 20. B 21. D

【分析】
19题需定位到第二段，查找作者提及的海龟蛋面临的危险数量；20题是代词指代题，需结合it所在句的前文语境判断指代对象；21题是细节排序题，需梳理文章中作者的活动先后顺序，匹配对应选项。
【解析】
19题：根据第二段内容，作者提到海龟蛋的危险有：①致命真菌导致蛋无法孵化；②幽灵蟹食用海龟蛋；③部分蛋发育异常，孵化出双头海龟难以存活，共3种，因此选B。
20题：第四段中，前文提到“They used the red lights to help us see the turtles better. Turtles can't see the red light very well.”，此处it指代前文的“the red light”，表示红灯不会对海龟产生太大影响，因此选B。
21题：梳理作者的活动顺序：①第一段“visited a turtle center in Kemaman”（④到达中心）；②第二段“when we arrived...one of them told us a sad story”（②工人讲悲伤故事）；③第三段“we saw some baby turtles hatch”（③看小海龟孵化）；④第四段“took the baby turtles to the beach...ran into the dark sea”（①看小海龟爬向大海），正确顺序为④②③①，因此选D。
【答案】
19.B 20.B 21.D
【知识点】
英语阅读理解 细节理解题 代词指代题
【点评】
本题为英语阅读理解题，考查学生对文章细节的查找、梳理及代词指代的理解能力，需学生仔细阅读原文，准确定位对应信息，难度适中。
【难度系数】
0.5