There are millions of stars and planets in space. What's the difference between stars and planets? Stars can give out heat and light, but planets cannot.

    The sun is one of the stars. Some planets are balls of rock and some are balls of gas. We live on the planet earth. The earth spins around once every day to give us day and night. The earth goes around the sun once every year to give us different seasons.

    There are eight planets moving around the sun. We call the family of the sun and its planets the solar system. Mercury is the nearest to the sun, so it is very hot. It is the smallest planet. Venus is very bright and hot. It is the nearest to the earth. Mars is covered with orange-red desi and rocks, so it looks like a red star in the sky. It has seasons like the earth. Jupiter has more than 16 moons （卫星）and it is the biggest and heaviest planet. Saturn has more than 22 moons. The other planets, such as Uranus and Neptune, are all very far from the sun and very cold. We need a telescope（望远镜）to see them.

    The monarch is one of the most beautiful butterflies. It is famous for its yearly migration（迁徙）from the northern part of North America to Mexico, There, millions of monarchs spend the winter together in one small area. This migration is one of the greatest wonders of nature. Yet this behavior has now put the monarch at risk.

    Every September, millions of monarchs from the United States fly to Mexico. After about two months of flying time, they reach their sanctuary(庇护所)in central Mexico. Then, in the warm climate of private and quiet valleys, far from most human activity, the butterflies create one of nature's great scenes. They cover every tree with bright color. The show lasts until spring, when the butterflies return north.

    While they are all crowded together, the monarchs are highly weak. If the environment in those valleys was disturbed, the whole species could be hurt or even die out. That is why for many years scientists who knew about the monarchs' winter sanctuary kept the location a secret.

    In recent years, however, the monarchs' secret has been discovered. Today, the butterflies' winter sanctuary is crowded with tourists, who disturb the environment. Worse still, local farmers who need more land to farm have begun to take up the area. They are cutting down trees, making it difficult for the butterflies to survive. They should not farm in the monarchs' sanctuary.

    People should act immediately to protect the species' winter sanctuary. Local farmers must be helped so that they no longer need to take land from the butterflies. Tourist visits to the butterflies' hidden valleys must also be limited. Unless these steps are taken soon, in a few years the monarch butterfly of North America may be just a beautiful memory.

    A about 6.0-magnitude(震级) earthquake(地震) hit Yi'bin, Sichuan at 22:55 on June 17th, 2019,and it killed at least 12 people and injured(受伤的) more than 220.

    Many people in Chongqing felt it. Most of them rushed out to the safe places such as the square, the playground, the street .But some didn't.

    What can we do when an earthquake happens? In fact, there's little we can do to stop natural disasters(自然灾害) such as earthquakes happening. But, some methods can reduce(减少) the harm they cause.

    Drop down onto your hands and knees. This way can protect you from falling.

    Cover your head under a strong table or desk. You can also stay along a wall, and cover your head with your arms and hands.

    Hold on to(守住，抓牢) your shelter(遮蔽物) until the shaking stops. Be prepared to move with your shelter if the shaking continues.

Schools can normally take the earthquake drills(演练) to help student stay alive.

提示：（1）Do you agree with Mary's mother?（2）What should Mary do?

要求：（1）短文须包括提示中的两个要点，可适当发挥。（2）文中不得出现真实的地名、校名和人名。（3）词数70个左右（开头、结尾已给出，不计入总词数）。

Dear Mary,

I'm sorry to hear that. I think 

Yours,

Sally