In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Article: Charlie studied in a famous college for four years. He studied hard and did well in all his subjects. He hoped to become a good teacher. This year he left the college and began to work in a middle school. He likes his students and is strict with them. He does his best to make his classes lively and interesting. One day he carefully explained a chemical reaction to the students of Grade 2 in the chemistry lab. "Be careful, everyone," he said loudly. "Before I make the experiment,there're twenty five atoms of carbon ,but after I finish it, there're twenty four atoms of carbon left!" He stopped to watch the classroom and hoped his students would go on explaining it. But the young men looked at each other and nobody answered him. He had to ask, "What happens? What makes the atom lost?" The classroom was very quiet and none of the students looked at their teacher. "Who can tell us where it has gone?" Suddenly a soft voice came from the back row, "We did not see anybody leave the lab!"
Answer: his students could do well in chemistry
Charlie hopes _ ,so he does his best to make his classes lively and interesting.

Article: Until a few months ago, he was a butler in one of the more expensive residential buildings in Manhattan. But now, Nepal-born Indra Tamang is the owner of two multi-million dollar apartments in the same building. The former owner - his former employer, Ruth Ford - died last year and left the apartments to Mr Tamang in her will. Mr Tamang is happy but quickly points out that his good fortune did not come easily. "I am happy and have been touched by the generosity of the Ford family," he says. "I never expected that I will be given the ownership of these apartments. But I have been working for the family for the last 36 years, devotedly, with honesty and dedication . So my hard work has been rewarded." Mr Tamang was 21 when he was brought from Nepal by Charles Ford, a writer and a photographer. Mr Ford died in 2002; his sister, actress Ruth Ford, then took charge and told Mr Tamang that he was like a brother to her after Charles's death. Mrs Ford died aged 98. During the last five years of her life, she lost her eyesight and also developed speech problems. Mr Tamang looked after her most of the time and took care of her medicines and food. He also worked with Charles Ford on various photography projects, which he now wants to keep as the photographer's legacy . He hopes to organize exhibitions of Mr Ford's photographs and edit a book of his works. Mr Tamang plans to sell the bigger, three-bedroom apartment to pay the taxes he owes to the government on his legacy. He says: "The rules of the building might be a problem, as they require a minimum monthly income to qualify to live as owner of apartments. I have my small house here but I am happy with it," Mr Tamang has learnt his lesson from the life of his employers and plans to use his money with great caution. "I think one should save money for old age. That's when you need it the most to get care," he says.
Answer: a reward
Mr Tamang treated the legacy as _ .

Article: Four hundred years ago, an Italian scientist named Galileo Galilei became the first person to see the craters on the moon. Galileo was one of the first people to use a telescope to study the sky. Since then, telescopes have become the most important tool used by astronomers. Scientists never stop finding new ways to make these instruments more powerful. In the next several years, two new telescopes with different purposes are to be used. One of the telescopes, called Pan-STARRS, could save humans from dying out. Nick Kaiser, a scientist who works on the project, says the Pan-STARRS telescope has been designed to find "90 percent of all killer asteroids near Earth". Pan-STARRS, like most telescopes, uses mirrors and lenses to provide pictures of outer space. Giant mirrors are used to "gather" light. They reflect the light onto the lens of a camera, which can then record the image. When completed, Pan-STARRS will include four telescopes which will be put on top of a mountain on the Hawaiian island of Maui. Only one telescope is in place and working now. Each telescope will take pictures of one patch of sky for about 30 seconds, and then move on to another patch. Every night, each telescope will take pictures of about 1,000 patches. Every week, each telescope will have photographed the whole sky. Each of the four telescopes will take pictures of the same patches of sky. One telescope, working alone, may sometimes incorrectly show an asteroid. If there are three other telescopes working, astronomers can use them to see if there really is an asteroid coming our way. By using four telescopes instead of one, scientists hope to get a better picture of space. If a giant asteroid was identified, astronomers would try to break it up long before it reached Earth.
Answer: introduce the topic of the passage
Galileo Galilei is mentioned to _ .