题目内容
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His principal reason for making the journey was to visit his family.
A．principle
B．possible
C．main
D．initial
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更多“His principal reason for making the journey was to visit his family.A．principleB．possibleC”相关的问题
Not long age, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly by night？ Tests with artificial stars have proved that certain night - flying birds are able to follow the stars in their long - distance flights.
A dove (鸽子) had spent its lifetime in a cage and had never flown under a 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. (76) The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the position of the artificial stars caused a change in the direction of his flight.
(77) But the stars are apparently their principal means of navigation (航行) only. When the stars are hidden by clouds, they seemingly find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it's too dark to see these, the doves circle helplessly, unable to find their way.
The reason why birds don't get lost on long flights ______.
A．have been known to scientists for many years
B．have only recently been discovered
C．are known by us
D．will probably remain a mystery
The (principal) reason for the great (number of) smoke is (that) there are (too many) factories in this area.
A．principal
B．number of
C．that
D．too many
听力原文： Why don't birds get lost on their long flights from one place to another？ Scientists have puzzled over this question for many years. Now they are 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 by night？ Tests with artificial stars have proved that certain night-flying birds are able to follow the stars in their long-distance flights.
A dove had spent his lifetime in a cage and had never flown under a 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. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the position of the artificial stars caused a change in the direction of his flight.
But the stars are apparently their principal means of navigation. When the stars are hidden by clouds, they apparently find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it's too dark to see these, the doves circle helplessly, unable to find their way.
The reason why birds don't get lost on long flights ______.
A．has been known to scientists for years
B．has only recently been discovered
C．is known by everyone
D．will probably remain a mystery
A．principal
B．number
C．that
D．too many
Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly by night？ (37) Tests with artificial stars have proved that certain night-flying birds are able to follow the stars in their long-distance flights.
A dove had spent its lifetime in a cage and had never flown under a 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. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the position of the artificial stars caused a change in the direction of his flight.
The stars are apparently their principal means of navigation. When the stars are hidden by clouds, they seemingly find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it's too dark to see these, the doves circle helplessly, unable to find their way.
The reason why birds don't get lost on long flights______.
A．has been known to scientists for years
B．has only recently been discovered
C．is known by everyone
D．will probably remain a mystery
Nothing certain is known of what he did between the time he left school and his departure for London. According to a local legend, he was beaten and even put in prison for stealing rabbits and deer from the estate of a neigh bouring landowner, Sir Thomas Lucy. It is said that because of this he was forced to run away from his native place. A different legend says that he was apprenticed to a Stratford butcher, but did not like the life and for this reason decided to leave Stratford.
Whatever caused him to leave the town of his birth, the world can be grateful that he did so. What is certain is that he set his foot on the road to fame when he arrived in London. It is said that at first he was without money or friends there, but then he earned a little by taking care of the homes of the gentlemen who attended the plays at the theatre. In time, as he became a familiar figure to the actors in the theatre, they stopped and spoke to him. They found his conversation so brilliant that finally he was invited to join their company.
What about Shakespeare's life is not known to people today？
A．His marriage.
B．His birthplace.
C．His education.
D．His plays.
Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly by night？ Tests with artificial stars have proved that certain night-flying birds are able to follow the stars in their long-distance flights.
A dove (鸽子)had spent its lifetime in a cage and had never flown under a 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. (76) The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the position of the artificial stars caused a change in the direction of his flight.
(77) But the stars are apparently their principal means of navigation(航行)only. When the stars are hidden by clouds, they seemingly find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it's too dark to see these, the doves circle helplessly, unable to find their way.
The reason why birds don't get lost on long flights ______.
A．have been known to scientists for many years
B．have only recently been discovered
C．are known by us
D．will probably remain a mystery
Nothing certain is known of what he did between the time he left school and his departure for London. According to a local legend, he was beaten and even put in prison for stealing rabbits and deer from the estate of a neighboring landowner, Sir Thomas Lucy. It is said that because of this he was forced to run away from his native place. A different legend says that he was apprenticed to a Stratford butcher, but did not like the life and for this reason decided to leave Stratford.
Whatever caused him to leave the town of his birth; the world can be grateful that he did so. What is certain is that he set his foot on the road to fame when he arrived in London. (80) It is said that at first he was without money or friends there, but that he earned a little by taking care of the horses of the gentlemen who attended the plays at the theatre. In time, as he became a familiar figure to the actors in the theatre, they stopped and spoke to him. They found his conversation so brilliant that finally he was invited to join their company.
Shakespeare ______ in his early life.
A．attended a public school
B．lived in London
C．studied Latin
D．was put in prison for stealing cattle
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