题目

在短文的空格内填入适当的词，使其内容通顺，每空格限填一词，首字母已给 Americans think that travel is good for people. Some even think it can help one of the country’s worst problem—crime. (犯罪) Crime worries a lot of people. Every year, the n    1   of crimes goes up and up. They often come from sad homes, with only one parent or no parents at all. There are problems with drugs. (毒品) There are many young criminals (罪犯) in prison. But prison doesn’t change them--60 to 70 percent will go b  2    to crime when they come out of priso植物不进行呼吸，动物能进行呼吸。 [     ]