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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: 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 _ .
Why? It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.

New input: Article: The saying "a penny for your thoughts" is an English idiom simply asking people to volunteer their opinions on an issue being discussed. In modern usage, it is often stated as an indirect way of asking what someone is thinking about. This phrase is basically a proposal , and the speaker is offering to pay to hear the listener's thoughts. It is an idiom, of course, and not meant literally so no real payment generally takes place. When the saying originated, a penny was worth a lot more than it is in the 21st century. Therefore, "a penny for your thoughts" likely indicated the thoughts were more valuable to those asking the listener for them than they are by today's standards. This loss of value can be used ironically , however, through tone of voice; it can be used to indicate that someone's idea is bad or worth a penny in modern value. The phrase is generally credited to a man by the name of John Heywood, who was born sometime just before the 16th century. During his life, he was a writer who penned many plays and a book in 1546, later known as The Proverbs of John Heywood. It is likely Heywood did not actually come up with the phrase "a penny for your thoughts". Rather, he was simply the first person to have set the phrase down in written form. The actual origins of the term are unknown, and since his book was simply a collection of common idioms and expressions, it was probably familiar to people in the mid 1500s. Another phrase similar to "a penny for your thoughts" is offering "your two cents" after making a statement. Someone might give his or her opinion and then say, "that's my two cents," to indicate the value of his or her idea. While, much like a penny, "two cents" is relatively low in value now, it would have been more valuable at one time and the expression is used in much the same way.
Answer: will pay for what you're thinking about
Solution:
When someone says "a penny for your thoughts", he or she _ .