Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably sing or whistle when you are happy.
Some scientists believe that birds do sing some of the time just because they are happy. However they sing most of the time for a very different reason. Their singing is actually a warning to other birds to stay out of their territory.
Do you know what a ‘territory’ is? A territory is an area that an animal, usually the male, claims as its own. Only he and his family are welcome there. No other families of the same species are welcome. Your yard and house are your territory where only your family and friends are welcome. If a stranger should enter your territory and threaten you, you might shout. Probably this would be enough to frighten him away.
If so, you have actually scared the stranger away without having to fight him. A bird does the same thing. But he expects an outsider almost any time, especially at nesting（筑巢）season. So he is screaming all the time, whether he can see an outsider or not. This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away.
Birds sing loudest in the spring when they are trying to attract a mate and warn others not to enter the territory of theirs.
You can see that birds have a language of their own. Most of it has to do with attracting mates and setting up territories.Some scientists believe that most of the time bird’s singing is actually________.
| A．an expression of happiness | B．a way of warning |
| C．an expression of anger | D．a way of greeting |
What does the underlined word “territory’’ mean?
| A．A place where families of other species are not accepted |
| B．A place where a bird may shout at the top of its voice |
| C．An area for which birds fight against each other |
| D．An area which a bird considers to be its own |
Why do birds keep on singing at nesting season?
| A．Because they want to invite more friends |
| B．Because their singing helps frighten outsiders away |
| C．Because they want to find outsiders around |
| D．Because their singing helps get rid of their fears |
How does the writer explain bird’s singing?
| A．By comparing birds with human beings | B．By reporting experiment results |
| C．By describing birds’ daily life | D．By telling a bird’s story |
Yet some people wonder if the revolution in travel has gone too far. A price has been paid, they say, for the conquest (征服) of time and distance. Travel_is_something_to_be_
enjoyed,_not_endured(忍受). The boat offers leisure and time enough to appreciate the everchanging sights and sounds of a journey. A journey by train also has a special charm about it. Lakes and forests and wild, open plains sweeping past your carriage window create a grand view in which time and distance mean nothing. On board a plane, however, there is just the blank blue of the sky filling the narrow windows of the airplane. The soft lighting, inflight films and gentle music make up the only world you know, and the hours progress slowly.
How does the writer support the underlined statement in Paragraph 2?
| A．By giving instructions. |
| B．By analyzing cause and effect. |
| C．By following the order of time. |
| D．By giving examples. |
The honey guide gives a loud cry that attracts the attention of both passing animals and people. Once it has their attention, it flies through the forest, waiting from time to time for the curious animal or person as it leads them to the nest. When they finally arrive at the nest, the_follower reaches in to get at the delicious honey as the bird patiently waits and watches. Some of the honey, and the wax, always falls to the ground, and this is when the honey guide takes its share....
What can be the best title for the text?
| A．Wild Bees |
| B．Wax and Honey |
| C．Beekeeping in Africa |
| D．HoneyLover's Helper |
Cold weather can be hard on pets, just like it can be hard on people. Sometimes owners forget that their pets are just as used to the warm shelter (住所) as they are. Some owners will leave their animals outside for a long period of time, thinking that all animals are used to living outdoors. This can put their pets in danger of serious illness. There are things you can do to keep your animal warm and safe....What do we learn about pets from Paragraph 1?
| A．They are often forgotten by their owners. |
| B．They are used to living outdoors. |
| C．They build their own shelters. |
| D．They like to stay in warm places. |
With a PhD in Mathematics Education from Georgia State University, Dr. Siegel teaches mathematics at Central Arizona College. His courses include various makeup classes and a number of lectures for future primary school teachers.
If the course fails to provide complete satisfaction to you, you can easily exchange it for any other course that we offer. Or you can get your money back.
Where is the passage most likely to have been taken from?
| A．A news report. |
| B．A book review. |
| C．A lesson plan. |
| D．An advertisement. |
The honey guide does not actually like honey, but it does like the wax in the beehives (蜂房). The little bird cannot reach this wax, which is deep inside the bees' nest. So, when it findsa suitable nest, it looks for someone to help it. The honey guide gives a loud cry that attracts the attention of both passing animals and people. Once it has their attention, it flies through the forest, waiting from time to time for the curious animal or person as it leads them to the nest. When they finally arrive at the nest, the_follower reaches in to get at the delicious honey as the bird patiently waits and watches. Some of the honey, and the wax, always falls to the ground, and this is when the honey guide takes its share.What do the words “the follower” in Paragraph 2 refer to?
| A．A bee. | B．A bird. |
| C．A honey seeker. | D．A beekeeper. |
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