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: As winter gives way to spring, students feel like taking outdoor activities. However, do remember that accidents can happen, such as the one that happened at Taihu Lake several weeks ago. Four students from Shanghai were killed and several were injured. There were several reasons for the accident, but if the students had worn life jackets, it would have made a big difference. Therefore, it is important to take steps to avoid accidents before going on trips whether on land or water. Here are some steps: Make sure you are physically fit for any activities. You need energy for hiking or boating after a long inactive winter. Research your route . Check the weather report so you can pack the correct things so that an unexpected downpour or high winds won't destroy your day. If you are visiting a different culture, learn some basic knowledge about what's accepted and what is not. Take plenty of water to prevent your body from losing too much water and be sure to wear the correct footwear to protect your feet. Don't go to faraway areas and never risk going into unknown waters. Going in a group is safer than going alone. If you have to travel by yourself, leave a note of your travel route, telephone number and how you are traveling. So if there's an emergency, people can get in touch with you.
Answer: introduce the topic of the passage
Student:
The accident at Taihu Lake is mentioned to _ .