Detailed Instructions: 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.
See one example below:
Problem: Article: Homework can put you in a badmood , and that might actually be a good thing. Researchers from the University of Plymouth in England doubted whether mood might affect the way kids learn. To find out the answer, they did two experiments with children. The first experiment tested 30 kids. Someshapes were hidden inside a different, larger picture. The kids had to find the small shapes while sitting in a room with either cheerful or sad music playing in the background. To test their mood, the scientists asked the kids to point to one of five faces, from happy to sad. Children who listened to cheerful music tended to point to the smiley faces while the others pointed to the unhappy ones. The researchers found that sad kids took at least a second less to find the small shapes. They also found an average of three or four more shapes. In the second experiment, 61 children watched one of two scenes from a film. One scene was happy, and the other was sad. Just like in the first experiment, kids who saw the sad scene acted better compared to the others. The researchers guessed that feeling down makes people more likely to focus on a problem or difficult situation. Not all scientists agree with them, however. Other studies argued that maybe, that cheerful music in the first experiment distracted kids from finding shapes. While scientists work on finding out the answers, it still might be wise to choose when to do your tasks according to your mood. After eating a delicious ice cream, for example, write an essay.
Answer: whether mood affects their learning ability
Solution: Researchers did experiments on kids in order to find out _ .
Explanation: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.

Problem: Article: I was waiting in line to register a letter in the post office at Thirty-third Street and Eighth Avenue in New York. I noticed that the clerk appeared to be bored with the job--weighing envelopes, handing out stamps, and issuing receipts--the same dull work year after year. So I said to myself, "I am going to try to make that clerk like me. Obviously, to make him like me, I must say something nice, not about myself, but about him." So I asked myself, "What is there about him that I can honestly admire?" That is sometimes a hard question to answer, especially with strangers. However, in this case, it happened to be easy. I instantly saw something I admired very much. So while he was weighing my envelope, I remarked with enthusiasm, "I certainly wish I had your hair." He looked up and his face was full of smiles. "Well, it isn't as good as it used to be," he said modestly. We carried on a pleasant conversation and the last thing he said to me was, "Many people have admired my hair." I'll bet that person went out to lunch that day walking on air. I'll bet he went home that night and told his wife about it. I'll bet he looked in the mirror and said, "It is a beautiful head of hair." There is one all--important law of human conduct. If we obey that law, we shall almost never get into trouble. In fact, that law, if obeyed, will bring us countless friends and constant happiness. But the very instant we break the law, we shall get into endless trouble. The law is this: Always make the other person feel important.
Answer: win his kindness
Solution:
The author commented on the clerk's hair to_.