Young people need a lot of money to buy a house in big cities.同义句转换答案：Young people need plenty of money to buy a house in big cities.解析：a lot of ……= plenty of ……大量的……...还有另一种方法吗？a lot of ……= plenty of……= lots of ……大量的……我的意思是不换a lot of.。那还有其他的方法吗A lot of money is needed by young people to buy a house in big cities.