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Leap Year
Leap year is a year that has 366 days instead of the usual 365. It normally occurs every four years, always on an even-numbered year. The extra day is added to our shortest month. That is the second month of the year, which in non-leap years has 28 days, two fewer than any other month. 71
Leap year is also called the bissextile year. 72 In our calendar system there is a need for a leap year because the solar year (the time it takes the earth to go around the sun once) is actually slightly more than 365 days long. That extra day—Feb. 29 every four years—helps correct the difference between our calendar and the solar calendar.
Leap year was first made part of the calendar by the ancient Roman leader Julius Caesar. His
astronomers had calculated the length of the solar year to be 365 days and six hours. So Caesar declared that an extra day be added to the calendar. 73
Caesar’s adjustment, however, was not entirely accurate because his astronomers’ year exceeded the true solar year by eleven minutes and fourteen seconds. By 1582, a difference of ten days had developed between the calendar year and the true solar year. To correct this error, Pope Gregory XIII ruled that every fourth year would continue to be a leap year except for century years that could not be divided evenly by 400. By this system, century years such as 1700, 1800, and 1900 were not leap years, but the year 2000 was a leap year. 74
Persons born on Feb. 29 celebrate their growing up a little differently from the rest of us. 75 But if they go strictly by the calendar, they have only one-fourth as many birthday celebrations as most people.
A. This is done every four years. B. This is its formal, or scientific title.
C. This may seem complicated, but it works. D. They acknowledge that they get older each year.
E. The leap year was introduced in the Julian calendar in 46 BC.
F. When you see Feb. 29 on a calendar, you know that year is a leap year.
G. In a leap year, the extra day is added to the second month, giving it 29 instead of the usual 28
days.
查看习题详情和答案>>What I Want for You and Every Child in America
by President-Elect Barack Obama
Dear Malia and Sasha,
I know that you’ve both had a lot of 1 these last two years during the campaign, going to picnics and parades and state fairs, eating all sorts of junk food your mother and I probably shouldn’t have let you have. But I also know that it hasn’t always been easy for you and Mom, and that although you are both excited about that new puppy(幼犬), it doesn’t 2 for all the time we’ve been apart. I know 3 I’ve missed these past two years, and today I want to tell you a little more about why I decided to take our family on this journey.
When I was a young man, I thought life was all about me--about how I’d 4 my way in the world, become successful, and get the things I want. But then the two of you came into my 5 with all your curiosity and mischief （捣乱） and those smiles that never 6 to fill my heart and light up my day. I soon found that the greatest joy in my life was the joy I saw in yours. That’s why I ran for President: because of what I want for you and for every child in this nation.
I want all our children to go to schools 7 of their potential---schools that challenge them, inspire them, and instill （灌输） in them a sense of 8 about the world around them. I want them to have the chance to go to college 9 their parents aren’t rich. And I want them to get good jobs: jobs that pay well and give them benefits like health care, jobs that let them have time to spend time with their own 10 .
I want us to 11 back the boundaries(界限) of discovery so that you’ll live to see new technologies and inventions that improve our lives and make our planet cleaner and safer. And I want us to push our own human boundaries to reach 12 the divides(分水岭) of race and region, gender and religion that 13 us from seeing the best in each other.
That was the 14 your grandmother tried to teach me when I was your age, reading me the opening lines of the Declaration of Independence and telling me about the men and women who marched for 15 because they believed those words put to paper two centuries ago should mean 16 .
She helped me understand that America is great not because it is perfect but because it can always be made better and that the 17 work of perfecting our union falls to each of us. It’s a duty we pass on to our children.
These are the things I want for you--- to 18 in a world with no limits on your dreams and no achievements beyond your reach. And I want every child to have the same 19 to learn and dream and grow that you girls have. That’s why I’ve taken our family on this great adventure.
I am so proud of both of you. I love you 20 you can ever know. And I am grateful every day for your patience, confidence, grace, and humor as we prepare to start our new life together in the White House.
Love, Dad
1. A. play B. fun C. pain D. gain
2. A. take up B. pick up C. make up D. put up
3. A. how much B. how many C. how soon D. how long
4. A. lose B. make C. take D. walk
5. A. world B. family C. position D. place
6. A. succeed B. come C. tend D. fail
7. A. worth B. worthless C. worthwhile D. worthy
8. A. humor B. hatred C. wonder D. sadness
9. A. even if B. as if C. as long as D. if
10. A. friends B. kids C. boys D. girls
11. A. rush B. catch C. push D. pull
12. A. to B. in C. into D. beyond
13. A. keep B. let C. make D. warn
14. A. way B. method C. means D. lesson
15. A. quantity B. quality C. equality D. quarter
16. A. everything B. something C. anything D. nothing
17. A. unfinished B. finished C. unfinishing D. finishing
18. A. wake up B. grow up C. come up D. get up
19. A. difficulty B. barriers C. anxiety D. chances
20. A. rather than B. other than C. less than D. more than
查看习题详情和答案>>—Sir， can I pass the examinations this time？
—That depends on you work hard enough or not.
A. what B. that C. whether D. how
查看习题详情和答案>>As far back as 700 B. C, man has talked about children being cared for by wolves. Romulus and Remus, the legendary（传说的）twin founders of Rome, were said to have been cared for by wolves. It is believed that when a she-wolf loses her litter, she tries to get human child to take its place. This seemingly foolish and unreasonable idea did not become believable until the late nineteenth century when a French doctor actually found a ten-year-old boy having nothing on wandering in the woods. He didn’t walk upright, could not speak understandably, nor could he relate to people. He only growled（嗥叫）and stared at them. Finally the doctor won the boy’s confidence and began to work with him. After many long years of devoted and patient teaching, the doctor was able to get the boy to clothe and feed himself, recognize and say a number of words, as well as write letters and form words.
The French doctor found the boy ________.
A. wandering in the woods B at his doorstep
C. growling at him D. speaking understandably
In this passage, the word “litter” in line 3 most nearly means ________.
A. garbage B. master C. hair D. baby animals
The doctor was able to work with the boy because ________.
A. the boy had never lost his mind B. the boy trusted him
C. the boy liked to dress up D. the boy worked very hard
Which of the following statements is not true?
A. She-Wolves have been said to replace human children for their lost litter.
B. Examples of wolves caring for human children can be found only in the nineteenth century.
C. The French doctor succeeded in training the boy to enjoy the human life somewhat.
D. The young boy never was able to speak perfectly.
In this passage, the word “relate to” most nearly means ________.
A. tell B. understand C. listen to D. write to
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