补全下列句子，每空词数不限。 Nowadays, a new term called SAHDs (stay-at-home dads) is becoming very popular. In the UK, there are 600,000 men who stay at home as full-time husbands. The number is 10 times more than 10 years ago. In the USA, there are at least 1.7 million unemployed (失业的) married men who depend on their wives. SAHDs have increased in number around the world. There are three reasons to explain this. First, the bad economic situation (经济形势) has caused the decline (衰退) in men’s traditional working fields, which has led to a large number of unemployed people. Second, the social and cultural progress provides a possibility for such a change in families. Third, the improvement in women’s education has also given them the chance to show their talents in w ork. Therefore, women are able to support their families. According to a survey in the UK, most stay-at-home fathers said the reason for this was that the mother made more money. The surve y also suggested the men that stayed at home were happier with this than the women, with 75% of fathers saying they were lucky to spend so much time with their children. 1. In the UK, the number of ___________________ is 10 times more than 10 years ago. 2. The numbers in the first paragraph are used to support the fact that _________________. 3. Three reasons are given to explain why ____________________. 4. Men’s traditional working fields have declined because of ____________________. 5. According to a survey in the UK, most stay-at-home fathers feel _______________ to stay at home.