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.

Let me give you an 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
The answer to this example can be: Researchers did experiments on kids in order to find out _ .
Here is why: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.

OK. solve this:
Article: All my life I had loved airports.To me,they were fl kind of magic gateway to the world,but today it seemed like a cold and heartless place. "Well,here we are,the airport,"my sister said with fl sigh.As 1 watched her unload my luggage,I could see the sadness in her eyes.One last hug and a final good-bye and I would be on my way to a new lire abroad,leaving my beloved sister behind. I looked at my sister and even though her eyes were filled with tears,she was trying to keep a brave face."You'd better go or you'll miss your flight,"she said. "I am just going to walk away and not look back," I said. As I held her one last time she whispered,"Don't worry about me,I'll be fine.""I'll miss you," I replied with tears in my eyes.As I promised,I did not look back. but 1 was sobbing.To me it was the end of the world. While boarding the plane 1 was still crying.I did not have the energy to put my bag in the overhead locker, so I put it on the empty seat next to mine.As I settled into my chair, a feeling of sadness overwhelmed me.I felt like my best friend had just been taken away from me. The plane shook heavily and the bag fell,with some stuff spreading on the floor.When I bent over to gather the things up,I saw an unfamiliar little book in the middle of my belongings.It was not until I picked it up that I realized that it was a diary. Immediately I recognized my sister's handwriting."Hi,Sis,What a day it has been today.First you let me know that you are moving abroad and then my boss..."My sister had been keeping a diary for the past month and she was now passing it on to me.I was to write in it for the next couple of months and then send it back to her.Even though a large ocean separated us,at some point it felt like she was actually there.
Answer: when she held her sister one last time
Answer:
The writer started to cry _ .