Q: Read the following article and answer the question. Article: You've heard of 3D printing from newspaper and TV programs. It can "print" in plastic, metal, nylon, and over a hundred other materials. 3D printing technology has been around since the 1980s, it was not widely used until the early 2010s. The first working 3D printer was created in 1984 by Chuck Hull. 3D printers use many different types of technologies, but they all share one thing in common: they create a three-dimensional object by building it layer , by continuing layer, until the whole object is completed. Imagine a baker lay down each layer one at a time until the whole cake is formed. 3D printing is somewhat similar, but just a bit stricter. How can 3D printers work so well? The most important thing-a program, a 3D printer also needs to have instructions for what to print from a computer. It needs a file as well. The file which is a Computer Aided Design (CAD) paper is created with the use of a 3D modeling program. The program creates a paper that is sent to the 3D printer. Along the way, software pieces the design into hundreds, or more likely thousands of layers. The 3D printer builds up one layer at a time, from the bottom to the top, until the object is done. 3D printings can be used for making many kinds of things such as machine parts, daily life objects, even human organs using a person's own cells. Nowadays, Marc. Dillon founds a project which deals with many world famous paintings like Leonardo da Vinci's Mona Lisa, Van Gogh's Sunflower with 3D technology. This project helps the blind people enjoy the fantastic art through touching. In order to provide a good user experience, these 3D paintings have special instruments which can tell people what they touch. Question: The first working 3D printer was created in _ . Answer:

OPTIONS:
- 1980
- 1984
- 2001
- 2010

A: 1984

input: OPTIONS:
- a reporter
- a teacher
- a doctor
- an officer Now, answer this question: Read the following article and answer the question. Article: When you cough or sneeze, please turn your head away from others and cover your mouth with the full part of your hand. Afterwards, you should say," Excuse me." This is a rule I set for my students. It is so simple, but many kids have never been told to do _ . In fact, I notice adults cough and sneeze in public without putting a hand over the mouth. I hate traveling by underground in New York during cold and flu season, because it is certain that someone is going to stand right behind me and cough or sneeze on my neck. One important thing I point out to the kids is that after they sneeze or cough on their hand, they should wash their hands as soon as possible. Otherwise, they will be passing those _ along to everything and everyone they touch. In order to help the students remember this rule, I tell them about an old story. It says that when you sneeze, evil spirits jump into your body. If you don't cover your mouth, the spirits will enter, but if you cover your mouth, you will keep them out, We say "God bless you" when someone sneezes, and in Germany you should say "Gesundheit". That means "Good health to you." Both expressions are said that if you didn't cover your mouth in time and the spirits were able to enter your body. The kids love finding out the origins of these expressions and it encourage them to put the advice to use more often. Question: The writer of this article must be _ . Answer:
A:
output: a teacher

Read the following article and answer the question. Article: A long walk in the desert or the mountains can be exciting. And it's a great way to keep fit. If you carry a tent and some food, you can camp overnight. But wild places can be dangerous. Here's how you can enjoy walking and camping safely. Before your trip Tell someone where you are going and when you expect to return. If you don't return on time, the people at home will know that you are lost or in trouble. They will know where to look for you. Make sure you've got a good map of the area that you're going to. Make sure you've packed the right equipment for your activities. The desert is often hot, but nights can be very cold, and sometimes there are big rainstorms. In the mountains, the weather can change suddenly. A sunny day can turn cold and cloudy quickly. The tools for survival Sunglasses, sun hat, sun cream, windproof jacket, good walking shoes or boots, food, water, maps, compass, first-aid kit, matches, rope, knife, ground sheet, the pack to carry your equipment. What to do if you get lost If you're in a car and it has broken down, stay with your car. If you are not traveling by car, make yourself easy to see. A signal fire can be seen at night. During the day, smoke may be used to show where you are. A brightly-colored blanket may help rescuers to find you. Stay where you are. If you walk for any reason, avoid walking during the hottest part of the day. Morning and evening walking is better for saving your energy water. Keep yourself away from the rain, wind and sun, but remember: try to make yourself be in sight. Question: According to the passage, we should make a fire to _ . Answer:

OPTIONS:
- show where we are
- keep warm at night
- cook our meal
- drive animals away

Answer: show where we are

Problem: OPTIONS:
- 6 yuan.
- 2 yuan.
- 3 yuan.
- 4 yuan.
Q: Read the following article and answer the question. Article: Hi, boys and girls! A new Mama store is in No. 1 Middle School now. Come and see at our great sale! We have bread for 3 yuan. Xiangpiaopiao milk tea is on sale for 2 yuan. Vegetable hamburgers are only 3 yuan. Do you need notebooks? They are only 6 yuan for three. We also have pens in all colors, only 1 yuan each . Some students want to buy socks. We have black socks for only 10 yuan for 3 pairs. For girls, we have socks in pink and purple, they are very nice. Come and buy your things at our great sale. Question: Mary wants to buy a notebook and a pen, she pays _ . Answer:
Answer: 3 yuan.

Problem:OPTIONS:
- Under the snow.
- In the street.
- In the garden.
- In the back of the garage.

Read the following article and answer the question. Article: One morning, Mr. Smith came into the garden at the back of his house. He saw so much snow in the garden. Mr. Smith wanted to take his car out, so he asked a man to clean the road from his garage to the gate. He said to the man, "Don't throw any snow on the side. It will damage the flowers in my garden, and don't throw any on the other side, because it will damage the wall. And don't throw any into the street, because the policeman will come." Then he went out. When he came back, the road was clean. There was no snow on the flowers, or the wall or the street. But when he opened the garage to get his car out, he saw: the garage was full of snow, the snow from the road, and his car was under the snow. Question: Where was Mr. Smith's car? Answer:
****
A:
Under the snow.