《2025年花山全优卷学科能力达标九年级英语上册人教版》

根据短文内容,从方框中选出能填入空白处的最佳选项。方框中有一项是多余的。
Monarch butterflies from eastern Canada make the most amazing journey in the insect world. Each year, this butterfly travels about 3,000 miles to its winter home in central Mexico. How can it fly so far? And why does it make this long and dangerous trip? Scientists still don’t have an answer.
For many years, people in Mexico wondered where the orange-and-black butterflies came from every winter. 1. ______For the next 20 years, he discovered that one butterfly started its journey in Canada. Four months later, it arrived in Mexico.
The length of the butterflies’ trip is only part of the mystery. 2. ______ How do the butterflies find their way back to the same place? 3. ______ 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. 4. ______ The first generation is born in the south in late April. It slowly moves north, reproduces(繁衍), and then dies. 5. ______ Each of these generations of butterflies lives for only two to five weeks. In the autumn, the fourth generation of butterflies is born. This generation has a much longer life. It lives for about eight months and makes the amazing journey back 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 offspring will be the first generation of the next circle of life.
Today, people are still studying the Monarch butterfly. But they are not clear about everything.
A. Each generation of the family has a very different life.
B. The second generation is produced and dies during their trip north.
C. Another amazing thing is that the butterflies always return to the same area in central Mexico.
D. On the trip north, two more generations are born, reproduce, and die.
E. This is an interesting question because only every fourth generation makes the trip south.
F. Then in 1937 a scientist started to follow and study the butterflies.
1.F 2.C 3.E 4.A 5.B

答案： 1.F 2.C 3.E 4.A 5.B