《英语B1》input隐藏属性设置阅读理解
81. Holidays in the United States usually occur at least once a month. Most months have a national holiday that has been arranged to be celebrated on a Monday. The holidays have all been decided to be celebrated on a Monday so that the workers may have 3-day weekends--- that is, Saturday, Sunday and Monday in order to rest or travel or do things with their families. Major holidays in the United States such as New Year’s Day or Christmas Day or the day, when we remember the first settlers of the United States, called Thanksgiving Day are celebrated all over the country. During these holidays most businesses close and the workers stay home and celebrate with their family.
Vacation can be from 2 weeks a year to 4 weeks a year. This usually depends on how long you’ve been working for a company, what type of position you have, whether you have a very high position or a very important position and it’s difficult to find someone to replace
you. In this case, you might take a few days at a time rather than taking one month all at once. Usually the more time you spend working for a company, the more time you may get f
or vacation.position of the day
1. The government of the United States makes it a rule for workers to have a ___ weekend almost once a month.
A. 1-day    B. 2-day    C. 3-day    D. 4-day
2. Workers in the United States sometimes work from___.
A. Monday to Saturday    B. Tuesday to Sunday
mongodb公司简介C. Thursday to Friday        D. Tuesday to Friday
3. Which statement is not true according to this passage
A. Only a few shops remain open on New Years Day.
B. Most of the workers needn’t work on Christmas Day.
C. Days on vacation must be more than all the holidays in a year.
D. All the workers have a half month vacation at last.
4. The reason why someone has to divide his vacation into several parts is that ___.
A. no one can be found to take his place
B. he hasn’t a most high position
C. he plays an important role in his work
D. he hasn’t been working for his company for a long time
5. Which of the following is the best title for this passage
A. Holidays in the United States
B. Vacation in the United States.
C. How do the workers spend their holidays.
cdn服务商排名D. Something about the holidays and vacation in the U.S..
82. Why don’t birds get lost in their long migratory flights Scientists have been puzzled over this question for many years. Now they’re beginning to fill in the blanks.
Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly mainly at night Tests with artificial stars have proved conclusively that certain night-flying birds are able to follow the star in their long-distance flights.
One such bird---a warbler(鸣禽)---had spent its lifetime in a cage and never flown under the natural sky. Yet it showed an inborn ability to use the stars for guidance. The bird’s cage was placed under an artificial star-filled sky at migration time. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the position of the make-believe stars caused a change in the direction of his flight.
Scientists think that warbler, when flying in daylight, use the sun for guidance. But the stars are apparently their principal means of navigation. What do they do when the stars are hidden by clouds Apparently, they find their way by such landmarks as mountain rang
es, coast lines, and river courses. But when it’s too dark to see these, the warblers circle helplessly, unable to get their bearings.
1. The reason why birds don’t get lost in migratory flights
Aword上下页合并. have been known to scientists for years .
B. have only recently been discovered.
C. are known by everyone.
D. will probably remain a mystery.
2. The experiment with the warbler indicated that
A. birds have to be taught to navigate.?
B. a bird that has been caged will not migrate.
C. some birds cannot fly at night.
D. some birds seem instinctively to follow the star when flying at night.
3. Under artificial stars, the bird in the cage
A. tried to fly in the same direction as birds not caged .
B. changed direction when the position of the stars was changed.
C. would not fly at all.
D. both A and B.
4. Warblers migrate
A. from North American to the Falkland Islands.
B. only once during their lifetime.
C自学网软件. using what is apparently an inborn navigational ability.