Question

【題目】

Monarch butterflies(帝王蝶) from the eastern part of North America make the most amazing journey in the insect world. Each year, this tiny creature(生物) travels up to 3,000 miles(4,800 kilometers) to its winter home in central Mexico(墨西哥). How can it fly so far? And what is the purpose of its long and dangerous trip? Scientists still don’t have an explanation.

The length of the butterflies’ trip is only one part of the mystery. The other amazing thing is that the butterflies always return to the same place in central Mexico. How do the butterflies find their way back to the same place? This is an interesting question because only every fourth generation(代) makes the trip south. In other words, the butterfly that travels to Mexico this year is the great-great-grandchild of the butterfly that traveled there last year.

Each year, four generations of a Monarch butterfly family are born. Each generation of the family has a very different life. The first generation of Monarchs is born in the south in late April. It slowly moves north, reproduces, and then dies. On the trip north, two more generations are born, reproduce, and die. Each of these generations of butterflies lives for only two to five weeks. In the fall, the fourth generation of butterflies is born. Compared to its parents, this generation has a long life. It lives for about eight months. This generation of butterflies makes the amazing journey to the winter home of its great-great-grandparents. The butterflies spend the winter there, and in the spring they reproduce and then die. Their children will be the first generation of the next circle. How amazing it is!

【1】From the passage we know that monarch butterflies ________.

A.spend their winter in North America

B.are small but can fly quite a long way

C.travel to central Mexico to reproduce

【2】There are ________ mysteries about monarch butterflies’ journey.

A.twoB.threeC.four

【3】The last paragraph is mainly about ________.

A.why Monarch butterflies fly from north to south

B.how Monarch butterflies make the amazing trip

C.when each generation of butterflies reproduce

【4】According to the article, which of the following is NOT TRUE?

A.Two of the generations are born on the trip back to south.

B.Only the fourth generation can live through the whole winter.

C.The first generation of Monarchs is born in the south in spring.

【5】We can read this passage on the ________ part of a magazine.

A.sports and healthB.science and technologyC.environment and nature

Answer 1

【答案】

【1】B

【2】A

【3】B

【4】A

【5】C

【解析】

文章大意：北美洲東部的帝王蝶每年飛行四千八百公里到它們位于墨西哥中部的冬季的家，而且總能返回相同的地方，且每四代帝王蝶能完成南飛的行程一次。

【1】細(xì)節(jié)理解題。根據(jù)第1段中“Each year, this tiny creature travels up to 3,000 miles(4,800 kilometers) to its winter home in central Mexico.”可知帝王蝶極小，但卻能飛行很遠(yuǎn)的路。故選B。

【2】細(xì)節(jié)理解題。根據(jù)第2段中“The length of the butterflies’ trip is only one part of the mystery. The other amazing thing is that the butterflies always return to the same place in central Mexico.”可知旅行距離長(zhǎng)是其中一件神秘的事，另一件神秘的事情是它們總能到達(dá)墨西哥中部的同一個(gè)地方，一共兩個(gè)謎團(tuán)。故選A。

【3】段落大意題。根據(jù)最后一段中從第一代帝王蝶四月末在南方出生講到往北的旅程中兩代帝王蝶出生病死亡，再到最后一代帝王蝶飛到冬季的家并產(chǎn)下下一代開(kāi)始下一個(gè)循環(huán)，可知這一段主要講帝王蝶如何完成這令人驚奇的旅行。故選B。

【4】細(xì)節(jié)理解題。根據(jù)最后一段中“On the trip north, two more generations are born, reproduce, and die.”可知兩待帝王蝶在北行的旅程中出生、生產(chǎn)和死亡，并不是在南歸的過(guò)程中，A項(xiàng)錯(cuò)誤；根據(jù)最后一段中“In the fall, the fourth generation of butterflies is born. … The butterflies spend the winter there, and in the spring they reproduce and then die.”可知只有第四代能活過(guò)整個(gè)冬天，B項(xiàng)正確；根據(jù)最后一段中“The first generation of Monarchs is born in the south in late April.”可知第一代帝王蝶出生于南方的春天，C項(xiàng)正確。故選A。

【5】推理判斷題。本文主要介紹了帝王蝶的相關(guān)內(nèi)容，是關(guān)于動(dòng)物的，應(yīng)該會(huì)出現(xiàn)在雜志的“環(huán)境與自然”部分。故選C。