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B
Is your birthday on
February 29th? Then you are a
lucky dog, because February
29th is a very special day. It comes every four years. It only appears in a leap year (闰年).
We know our calendar year has 365 days, but it takes the earth 365.2422 days to go around the Sun once. That means we have about six more hours each year. It is hard to add these hours to our year annually (每年一次). But if we don't add the time to our year, our calendar will get out of sync (同步) with the seasons. After a long time, the months and the seasons won't match up anymore. For example, in a few centuries, the summer month, July, might fall in the cold winter. So we add an extra (额外的) day to the calendar every four years to make up the difference. The extra day is February 29th. People call this year a leap year.
Leap years usually happen every four years. But when a year is a century year, like 1900 or 2000, if the year is not divisible (可整除的) by 400, then it is not a leap year. For example, 1900 is not a leap year, but 2000 is.
The leap year was a great idea of ancient people. It proved that ancient people had made great achievements in exploring nature and got along well with it.
(
A. Every year.
B. Every two years.
C. Every three years.
D. Every four years.
(
A. Why we have leap years.
B. When we have leap years.
C. Why the months and the seasons won't match up anymore.
D. When the months and the seasons won't match up anymore.
(
A. 2100.
B. 2200.
C. 2300.
D. 2400.
(
A. There are 29 days in February in a leap year.
B. In fact, a natural year is less than 365 days.
C. July will be a winter month after a long time.
D. We always have a leap year every four years.
(
A. The Extra Day
B. A Great Idea
C. The Leap Year
D. A Special Birthday
Is your birthday on
February 29th? Then you are a
lucky dog, because February
29th is a very special day. It comes every four years. It only appears in a leap year (闰年).
We know our calendar year has 365 days, but it takes the earth 365.2422 days to go around the Sun once. That means we have about six more hours each year. It is hard to add these hours to our year annually (每年一次). But if we don't add the time to our year, our calendar will get out of sync (同步) with the seasons. After a long time, the months and the seasons won't match up anymore. For example, in a few centuries, the summer month, July, might fall in the cold winter. So we add an extra (额外的) day to the calendar every four years to make up the difference. The extra day is February 29th. People call this year a leap year.
Leap years usually happen every four years. But when a year is a century year, like 1900 or 2000, if the year is not divisible (可整除的) by 400, then it is not a leap year. For example, 1900 is not a leap year, but 2000 is.
The leap year was a great idea of ancient people. It proved that ancient people had made great achievements in exploring nature and got along well with it.
(
D
)46. How often will you have a birthday if you were born on February 29th?A. Every year.
B. Every two years.
C. Every three years.
D. Every four years.
(
A
)47. What does the main idea of Paragraph 2?A. Why we have leap years.
B. When we have leap years.
C. Why the months and the seasons won't match up anymore.
D. When the months and the seasons won't match up anymore.
(
D
)48. Which of the following years is a leap year?A. 2100.
B. 2200.
C. 2300.
D. 2400.
(
A
)49. What can we learn form the text?A. There are 29 days in February in a leap year.
B. In fact, a natural year is less than 365 days.
C. July will be a winter month after a long time.
D. We always have a leap year every four years.
(
C
)50. What is the best title for this text?A. The Extra Day
B. A Great Idea
C. The Leap Year
D. A Special Birthday
答案
46. D 由第一段第三句可知出生于2月29日的人每四年才过一次生日。
47. A 由第二段倒数第三句话中的 so 可知，前后为因果关系，说明为什么会有闰年。
48. D 由第三段可知，世纪年份能被400整除才是闰年，所以2400是正确的。
49. A 由第二段最后两句可知，闰年2月有29天。
50. C 本文主要围绕闰年展开，所以最佳标题是 The Leap Year。
47. A 由第二段倒数第三句话中的 so 可知，前后为因果关系，说明为什么会有闰年。
48. D 由第三段可知，世纪年份能被400整除才是闰年，所以2400是正确的。
49. A 由第二段最后两句可知，闰年2月有29天。
50. C 本文主要围绕闰年展开，所以最佳标题是 The Leap Year。
解析
【分析】
这是一篇关于闰年的英语阅读理解题，共5道小题，围绕闰年的相关知识考查细节理解与主旨把握。解题思路：1. 细节题需定位原文对应信息，结合闰年规则判断选项；2. 主旨题需梳理段落或全文核心内容，排除偏离主旨的选项。
【解析】
46题：根据第一段第三句“It comes every four years.”可知，2月29日每四年出现一次，因此出生于该日的人每四年过一次生日，选D。
47题：第二段讲述地球公转时间非整数，若不额外加一天，日历会与季节不同步，主旨为“为什么有闰年”，选A。
48题：根据第三段，世纪年需能被400整除才是闰年，2100、2200、2300均不能被400整除，仅2400符合，选D。
49题：A选项对应第二段最后两句，闰年2月有29天，正确；B选项自然年为365.2422天，比365天多，错误；C选项原文是“might fall”（可能），非“will”（会），错误；D选项世纪年需被400整除，并非每四年都是闰年，错误，选A。
50题：全文围绕闰年的由来、判断规则等展开，核心是“闰年”，选C。
【答案】
46.D 47.A 48.D 49.A 50.C
【知识点】
英语阅读理解、细节理解、主旨大意、闰年判断
【点评】
本题考查学生对文本细节的查找能力和主旨归纳能力，涉及闰年相关知识，题目难度适中，学生通过定位原文信息即可解答。
【难度系数】
0.7
这是一篇关于闰年的英语阅读理解题，共5道小题，围绕闰年的相关知识考查细节理解与主旨把握。解题思路：1. 细节题需定位原文对应信息，结合闰年规则判断选项；2. 主旨题需梳理段落或全文核心内容，排除偏离主旨的选项。
【解析】
46题：根据第一段第三句“It comes every four years.”可知，2月29日每四年出现一次，因此出生于该日的人每四年过一次生日，选D。
47题：第二段讲述地球公转时间非整数，若不额外加一天，日历会与季节不同步，主旨为“为什么有闰年”，选A。
48题：根据第三段，世纪年需能被400整除才是闰年，2100、2200、2300均不能被400整除，仅2400符合，选D。
49题：A选项对应第二段最后两句，闰年2月有29天，正确；B选项自然年为365.2422天，比365天多，错误；C选项原文是“might fall”（可能），非“will”（会），错误；D选项世纪年需被400整除，并非每四年都是闰年，错误，选A。
50题：全文围绕闰年的由来、判断规则等展开，核心是“闰年”，选C。
【答案】
46.D 47.A 48.D 49.A 50.C
【知识点】
英语阅读理解、细节理解、主旨大意、闰年判断
【点评】
本题考查学生对文本细节的查找能力和主旨归纳能力，涉及闰年相关知识，题目难度适中，学生通过定位原文信息即可解答。
【难度系数】
0.7
