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The Monarch’s Journey
Many animals move from one place to another at certain times of the year. This annual movement is called migration. They migrate to find food, seek a partner, or in search of warmer weather. One of the most wonderful migrations in nature is that of the North American monarch butterfly.
Every autumn, millions of these beautiful insects with fine black and orange wings begin a long and difficult journey. Somehow they manage to travel around 4,000 kilometres south and find their way to California or Mexico. However, until recently no one knew how they did this.
A team of scientists led by Professor Eli Shlizerman at the University of Washington has now found the answer. They have found out that the monarch is able to tell the time of day. It uses its eyes to measure the position of the sun. These two pieces of information — the time of day and the point where the sun is in the sky — allow the butterfly to determine the way to go. Eventually, it manages to reach the places where it will spend the winter.
The solution to the mystery of the monarch’s amazing ability comes at a time when it is in serious trouble. Its population has crashed by as much as 90 per cent in the last few years. Sadly, human activity is the main reason why the number of monarch butterflies is falling. In many of the places where the butterfly can be found, people are destroying the natural environment. They cut down trees and use chemicals that kill the plants that monarch caterpillars eat.
The research on the monarch’s behaviour has however led to a greater awareness of this creature. People have been working together to record its migration and make sure that there are enough plants for it to feed on. If this works, there may come a time when the number of monarch butterflies increases once again. The more we know about this lovely creature, the greater the chance it will survive and keep its place in the natural world for a long time to come.
1. What’s the main idea of the text?| A．The routes of the Monarch’s migration. |
| B．The reasons of the Monarch’s migration. |
| C．The significance of the Monarch’s migration. |
| D．The study of the Monarch’s migration. |
| A．To tell us what migration is exactly. |
| B．To tell us the reasons for migration. |
| C．To introduce the topic of the text. |
| D．To tell us how many animals migrate. |
| A．They may lose their way. |
| B．They can’t see anything. |
| C．They can’t find any food. |
| D．They will feel very cold. |
| A．Negative. | B．Neutral. |
| C．Indifferent. | D．Positive. |
| A．Being caught by humans. |
| B．The destroyed natural environment. |
| C．The bad weather condition. |
| D．Being eaten by birds. |
(1)
(2)
【推荐2】Five years ago, French navy officer Jérôme Chardon was listening to a radio program about the journey of the bar-tailed godwit, a bird that migrates 14,000 kilometers between New Zealand and Alaska. Chardon understood how treacherous the journey would be, as heavy storms frequently hit Pacific island communities. Yet, somehow, bar-tailed godwits routinely pass through the area uninjured. Chardon wondered whether learning how birds traveled could help coastal communities avoid natural disasters.
Which of the following best explains the word “treacherous” underlined in paragraph 1?
| A．Strange. | B．Boring. | C．Frequent. | D．Dangerous. |
