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: Early one morning,more than a hundred years ago,an American inventor called Elias Howe finally fell asleep.He had been working all night on the design of a sewing machine but he had run into a very difficult problem: It seemed impossible to get the thread to run smoothly around the needle. Though he was tired,Howe slept badly.He turned and turned.Then he had a dream.He dreamt that he had been caught by terrible savages whose king wanted to kill him and eat him unless he could build a perfect sewing machine.When he tried to do so,Howe ran into the same problem as before.The thread kept getting caught around the needle.The king flew into the cage and ordered his soldiers to kill Howe.They came up towards him with their spears raised.But suddenly the inventor noticed something.There was a hole in the tip of each spear.The inventor awoke from the dream,realizing that he had just found the answer to the problem.Instead of trying to get the thread to run around the needle,he should make it run through a small hole in the center of the needle.This was the simple idea that finally made Howe design and build the first really practical sewing machine. Elias Howe was not the only one in finding the answer to his problem in this way.Thomas Edison,the inventor of the electric light,said his best ideas came into him in dreams.So did the great physicist Albert Einstein.Charlotte Bronte also drew in her dreams in writing Jane Eyre. To know the value of dreams,you have to understand what happens when you are asleep.Even then,a part of your mind is still working.This unconscious ,but still active part understands your experiences and goes to work on the problems you have had during the day.It stores all sorts of information that you may have forgotten or never have really noticed.It is only when you fall asleep that this part of the brain can send messages to the part you use when you are awake.However,the unconscious part acts in a special way.It uses strange images which the conscious part may not understand at first.This is why dreams are sometimes called "secret messages to ourselves ".
Answer: the only person at the time who knew the value of dreams
According to the passage,Elias Howe was _ .

Article: A few weeks ago, a friend of Smile Groups gifted me PS100 to do good deeds with. Since then I have used the money in the U.K. and the U.S and have helped some strangers, generally raising a lot of smiles. They have warmed my heart, but none so much as the gift I was able to give just an hour ago. I was in a shop looking at the second-hand books. It just so happened that the bookshelves were next to the toy section. After a few minutes I became aware of a group of women standing behind me. They were poorly dressed and spoke in what sounded like an eastern European language. As the little girl, about three years old, came over to the toy section, immediately her attention was caught by a toy. She spoke to her mother and in halting English her mother asked the shop assistant how much it cost. PS3 was the answer. The mum looked down at her child, perhaps calculating what she still had to buy and how much money she would have left. Then she simply shook her head. The child didn't react badly as some children might. Being told no was obviously not a new experience for her. But she couldn't keep the disappointment from her face. I had the total of four pounds in my pocket, two PS2 coins. A moment later, I tapped the mother on the shoulder, and pointed to the coins which I had left and said, "Buy her a dolly, too." I didn't hang about to see the end result. _ . I made my way out of the shop and into the sunshine. The money my friend gave me was an investment in the happiness of the world. Was there any better way, I wondered, to get so much happiness with so little money than to buy a toy for a little girl?
Answer: was greeted with smiles
When helping strangers with the money, the author _ .

Article: "It's this time of year when the weather starts warming up and frogs start breeding - but they haven't been breeding," says John Wilkinson, research and monitoring officer at the Amphibian and Reptile Conservation Trust (ARC). Amphibians are just one of the groups of animals that nature observers fear may have problems reproducing this year, as groundwater levels are even lower now than in the infamously dry summer of 1976, according to the Department for Environment, Food and Rural Affairs (Defra). According to the UK's Centre for Hydrology and Ecology the average rainfall so far this winter has been the lowest since 1972. "If ponds dry up totally," says Mr. Wilkinson, "you could have lots of dead tadpoles." Drier and windier conditions could also make it more difficult for juvenile amphibians to survive their journeys between wet habitats. But Peter Brotherton, the biodiversity manager for Natural England, says that "drought is part of nature's cycle", and, at present, a lot of animals, plants and insects are still in hibernation. This means that the population picture is unclear. "However, when we get extreme events, we get animals dying," he says. "And what is worrying is that normally at this time of year we expect soil to be near saturation after winter." Charlie Kitchin, the RSPB's site manager of the Nene Washes in Cambridgeshire, says the 2,000-acre wetland and grassland area is now struggling following two winters with relatively little winter rain and no flooding. One species that could suffer, he says, is the black-tailed godwit . "There are only 50 breeding pairs in the country, and we have 40 of them, and everything is bone-dry," Mr Kitchin says. But one bad nesting season, he says, is "not the end of the world". "One of the features of flood plains is that they're _ anyway," he adds. "But if they fail to breed another year, the population is likely to dip again."
Answer: drought
According to the passage animals may have problems reproducing this year mainly due to _ .