If your pen broke at school today, what would you do? You would go to a shop and buy a new one. What if you could simply print out a real, working pen with your 3-D printer without leaving your room?

    Ten years ago people could only see 3-D printing in science fiction movies. But now 3-D printing is here and it's bringing big changes.

    Unlike normal printing that can only copy a 2-D picture with ink. 3-D printing can build almost anything made from material. The printer layers(分层) the material in different shapes to create the object you want to be copied.

    The 3-D printer has been used to make many different things. People have made cups, cars and even an airplane with it. Doctors have been using 3-D printers for several years. People's nervous systems(系统) have been printed out in 3-D form in medical research. Some body parts have been printed and used in hospital. Several months ago, doctors used a 3-D printer to rebuild the face of a person who had a bad accident. In the future, it is expected that the printer will make human organs(器官)to save more lives.

    However there are drawbacks to the printer. At the moment, printing can be quite slow and it's still rather expensive. The average(平均的) price of a household printer is around $1,700, not including the cost of the materials.

    But as the technology develops, it shouldn't be long before disadvantages are improved. Only time will tell where this new technology will take us.

    When you look at the sky at night, the Moon looks bigger than the stars. Actually (实际上), the Moon is much smaller than the stars and the Sun. It's much smaller than the Earth. But the Moon is much closer to us than any star. That is why it looks so big. If you hold a coin close to your eyes, it looks big. If you look at it across the Moon, it looks small.

    The Moon moves around the Earth. It makes one trip in about four weeks. The Moon looks flat to us. But it is a round ball, like the Earth.

    People once thought the Moon had fire (火) on it. They thought the fire made it bright. Now we know the Moon is like a mirror. It gets its light from the Sun.

    Our sunlight comes from the Sun, too. What is the Sun? The Sun is a star. The stars we can see have their own light. There are many big stars we cannot see. Their light has burned out. Others are still bright, but they are so far away that we cannot see them. The Sun looks bigger and much brighter than other stars in Galaxy because it is the nearest of all stars. The Sun and the other stars we see are very hot, but the air around us saves us from the heat of the Sun.

    The Sun gives us light and warmth (温暖). It makes plants grow and turns leaves green. It makes life possible on the Earth. It is a life giving star.

要求：

1.描述你的暑假生活，包括你做过的有趣的事情、去过的地方等。

2.谈谈你对新学期的期待， 比如你想在哪些科目上取得进步、想参加哪些活动等。

3.包含必要的信息点，注意分段可适当增加细节、感受使行文连贯。字数不少于80词。

4.书写整洁！ 书写整洁！ 书写整洁！

My Summer Vacation and New Hopes

 In a small village, there is a girl named Lena. She is afraid of 1 in front of people. When she speaks, she is2 and her face turns red.

 One day, the water of 3 village dries up"One of us should go to the nearest town for help." a villager says.4 no one answers(回复) . Right at the moment, Lena 5 . She knows it is not just for herself, but for the village.

 Lena 6 to the town. When Lena gets there and faces the 7 , she feels nervous. She takes a deep breath(深呼吸) and 8 to tell the story of her village. Everyone in the 9 is moved (感动的) . At last, they decide to help the village. When Lena comes back with the10 news, all the villagers thank her again and again.

 Sometimes, the best way to solve a problem is to face it.