五、完形填空。(2025·江苏连云港高新技术产业开发区一模)
On the dark night of May 5th in the year 1110, the moon slowly disappeared. 1 the stars could be clearly seen, the moon couldn't be seen until nearly daytime. People 2 their worries about it, but nobody knew what happened. For over 900 years, scientists have been trying to 3 what caused the strange event. However, almost 4 was able to come up with any ideas.
Now scientists have finally found the 5—a volcanic(火山的) eruption. It happened in Japan's Mount Asama, from the beginning of September to the end of October in 1108, which lasted nearly two 6. As a result, a lot of ash(灰) was produced. It moved 7 towards the sky. At last, the ash 8 people seeing the moon.
But 9 did scientists discover this? They looked at the ice 10 Greenland and Antarctica. The huge ice was 11 for scientific studies. It could 12 what the climate(气候) was like a long period of time ago and what was in the air at that time. Scientists noticed that there was more volcanic ash in the 13 around May 5th, 1110.
Tree rings(树木的年轮) were also 14 in getting the answer. The rings changed with climate change. Scientists were able to see that the year 1109 was a cold and rainy year and that people 15 to get enough food. This supported the idea that a volcano had erupted.
()1. A. Because
B. Though
C. Unless
D. If
()2. A. hid
B. remained
C. explained
D. expressed
()3. A. find out
B. give out
C. bring out
D. clear out
()4. A. nobody
B. somebody
C. anybody
D. everybody
()5. A. enemy
B. answer
C. position
D. purpose
()6. A. days
B. weeks
C. months
D. years
()7. A. quietly
B. certainly
C. slowly
D. simply
()8. A. prevented
B. suggested
C. kept
D. minded
()9. A. how
B. when
C. where
D. why
()10. A. through
B. into
C. with
D. from
()11. A. useful
B. dangerous
C. strange
D. awful
()12. A. record
B. offer
C. divide
D. show
()13. A. rain
B. snow
C. wind
D. ice
()14. A. meaningless
B. helpful
C. impossible
D. terrible
()15. A. refused
B. decided
C. failed
D. forgot

五、1. B 【点拨】because 因为；though 虽然；unless 除非；if 如果。前后两句之间是让步关系。故选 B。
2. D 【点拨】hide 隐藏；remain 保持；explain 解释；express 表达。根据“their worries about it”可知，是人们表达了他们对此事的担忧。故选 D。
3. A 【点拨】find out 查明；give out 分发；bring out 激发；clear out 清理。根据“what caused the strange event”可知，科学家一直试图查明导致这件事情的原因。故选 A。
4. A 【点拨】nobody 没有人；somebody 某人；anybody 任何人；everybody 每个人。根据语境可知，几乎没有人能提出任何想法。故选 A。
5. B 【点拨】enemy 敌人；answer 答案；position 位置；purpose 目的。根据语境可知，是科学家找到了这一奇怪事件的答案。故选 B。
6. C 【点拨】day 一天；week 周；month 月；year 年。根据“from the beginning of September to the end of October”可知，是近两个月。故选 C。
7. C 【点拨】quietly 安静地；certainly 当然；slowly 缓慢地；simply 简单地。根据语境可知，是缓慢地向着天空移动。故选 C。
8. A 【点拨】prevent 阻止；suggest 建议；keep 保持；mind 介意。根据“people seeing the moon”可知，火山灰阻止了人们看到月亮。故选 A。
9. A 【点拨】how 如何；when 什么时候；where 在哪里；why 为什么。根据后文可知，此处是指科学家如何发现这一点的。故选 A。
10. D 【点拨】through 穿过；into 到……里面；with 和；from 来自。根据语境可知，是来自格陵兰岛和南极洲的冰。故选 D。
11. A 【点拨】useful 有用的；dangerous 危险的；strange 奇怪的；awful 糟糕的。根据后文可知，是对科学研究有用。故选 A。
12. D 【点拨】record 记录；offer 提供；divide 使分离；show 展示。根据“what the climate(气候) was like a long period of time ago and what was in the air at that time”可知，可以展示之前的气候以及当时的空气中都有什么。故选 D。
13. D 【点拨】rain 雨；snow 雪；wind 风；ice 冰。根据“They looked at the ice”可知，是在冰中发现了火山灰。故选 D。
14. B 【点拨】meaningless 毫无意义的；helpful 有帮助的；impossible 不可能的；terrible 糟糕的。根据“in getting the answer”可知，年轮也有助于得到这个答案。故选 B。
15. C 【点拨】refuse 拒绝；decide 决定；fail 失败，未能（做到）；forget 忘记。根据“the year 1109 was a cold and rainy year”可知，因为寒冷多雨，所以人们未能得到足够的食物。fail to do sth 未能做某事。故选 C。