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.

[Q]: Article: At night, bats fly through the air, catching hundreds of insects and other small animals. But during the day, they hardly move at all. Instead, bats pass the time hanging upside down from a secret spot. There are a couple of reasons why bats rest this way. First of all, it puts them in a position for takeoff. Unlike birds, bats can't fly into the air from the ground. Their wings don't produce enough lift to take off from a dead stop, and their hind legs are so small and underdeveloped that they can't run to build up the necessary takeoff speed. Instead, they use their front claws to climb to a high spot, and then fall into flight. During the hours when most enemies are active, bats gather where few animals would think to look and most can't reach. This allows them to disappear from the world until night comes again. There's also little competition for these resting spots, as other flying animals don't have the ability to hang upside down. Bats have a unique physiological adaptation that lets them hang around this way without using any energy. For you to hold your fist around an object tight, you contract several muscles in your arm, which are connected to your fingers by tendons ;as one muscle contracts, it pulls a tendon, which pulls one of your fingers closed. A bat's talons close in the same way, except that their tendons are connected only to the upper body, not to a muscle. To hang upside down, a bat pulls its claws open with other muscles. To get the talons to take hold of the surface, the bat simply lets its body relax. The weight of the upper body pulls down on the tendons connected to the talons, causing them to hold tight. Therefore, the bat doesn't have to do anything to hang upside down.
Answer: they can't start to fly from the ground directly
[A]: Bats hang upside down because _ .

[Q]: Article: Years ago, the American writer Kurt Vonnegut often said there was one story that would always make a million dollars: Cinderella. In Hollywood and in today's economy, it is more like $70 million and that is just a start. "Cinderella" made that amount in ticket sales when it opened last weekend. But the merchandising deals linked to the movie are also hugely valuable. So the artistic success of the film is open to debate. What is clear, however, is the movie's business success. It is a hit in the theaters but it is also a hit in retail . And Disney widened its usual market for "Cinderella" products. There are products connected to the Disney film targeted not only at little girls, but women, too. For example, the famous shoe designer Jimmy Choo partnered with Disney to create a version of Cinderella's "glass slippers" or shoes. You can buy them for about $5,000. At that price, you would not want to lose one at the ball, even if that is the way you get your prince. Several other shoemakers also accepted Disney deals to design versions of the famous footwear. The makeup company MAC quickly sold all its products with official links to "Cinderella." But lucky buyers were soon selling the products on the online marketplace eBay for many times the original price. HSN is a popular television and online retailer of jewelry, clothing and objects for the home. The marketer is now an exclusive seller of "Cinderella" products. So, is there anything left for the children, those people we think of as the traditional audience for the age-old fairy tale? Yes, you can find toys and other children's products at the American retailer JC Penney. Of course, you can also visit a Disney store. Disney also produced an animated version of "Cinderella." It came out in 1950 and is considered a classic. Which do you think the Disney company does better: live action or animated films? Post your thoughts in the comments section.
Answer: make-up producers
[A]: Products connected to the film "Cinderella" are generally aimed at _ .

[Q]: Article: I would recommend uVolunteer Programs in Costa Rica to anyone. Everyone can learn something and enjoy their time here if they have the ability to adapt to different circumstances and a sense of adventure. I came to San Ramon---the capital of Costa Rica, hardly knowing any Spanish, so the first thing I did there was to take Spanish courses at Spanish Language School for a week. My family stay was also of great help to my language study, but that experience with the classes gave me _ on the language, which has been extremely valuable. Once in San Ramon, I was fortunate enough to experience several projects with amazing people. I taught Adult English Night Classes, helped at an elementary school, and also went to the Community Center in Bajo. The adult classes are just so awesome because it can be really engaging, social, and fun while being educational. We all learned a lot from each other and became pretty close. The Sabana School was a nice elementary school right by the dorm. The kids were so incredibly nice, even giving me lots of hugs and small gifts. I came at a time when there were many holiday celebrations so there were some scheduling challenges, resulting in me being there to assist English classes a couple of hours in the morning. I decided to go to Bajo in the afternoons. I, like all of the other volunteers, absolutely loved it. This is a place where I felt I was really helping in a more significant way. The kids started to open up more to me the more I was there playing with the kids and helping with the educational programs. The staff and kids are just incredible. Aside from work, we decided on some weekend trips. By the end of my stay I had experienced hot volcanic springs in La Fortuna, snorkeling and hiking with incredible wildlife in Puerto Viejo, caving in Nicaragua, and kayaking and night fishing (we ate the fish too) in Playa Hermosa. I also enjoyed dancing, eating, and watching performances during the San Ramon festivals.
Answer: they are flexible and adventurous
[A]:
Everyone can benefit from uVolunteer Programs in Costa Rica as long as _ .