Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
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 _ .
Reason: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.

Now, solve this instance: Article: Welcome to Cambridge Dictionaries Online! Cambridge University Press publishes a range of dictionaries for learners of English all around the world. You can search our dictionaries using the search box at the top of the page. New for elementary learners We've added two new choices to Cambridge Dictionaries Online-Essential British English and Essential American English. Both are for elementary, and lower intermediate learners of English, and are specially written to make the definitions and examples easy to understand. They cover all of the vocabulary that elementary and lower intermediate students need to make progress, and help students to arrange their learning by showing the words that should be known at Al, A2, and B1 levels. You can look up the dictionaries from the dropdown box at the top of the page. More than just a dictionary Don't forget to visit our New Words, which keeps you up to date with those words and meanings that are just starting to be used in English. There's also About Words, our fascinating blog about how the English language behaves. You can give your opinion on new expressions or blog posts by voting or leaving comments, so get involved! Tell your friends! If you find something you like, you can now share it with your friends. Just elide on the relevant icon to spread the word. You can also become a fan on Facebook, follow us on Twitter, or add a Cambridge Dictionary toolbar to your computer -- it's now easier than ever. Do you like Cambridge Dictionaries Online? Could you make it even better? Let us know your thoughts and ideas! Email us and let us know: dictionary@cambridge.org. Paul Heacock Dictionaries Publishing Manager Cambridge University Press
Answer: middle school students
Student:
The new-added Cambridge Dictionaries online are probably most suitable for _ .