阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
Recently a new research has been reported. It said that many fathers of children experienced lots of injuries per year while playing with ____ (they)children. Some fathers felt that it was the most dangerous thing of being a parent walking across the floor ____ (cover)by toys. And some of them fell over because clothes or other things____ (throw)everywhere. Besides, ____ third of fathers were knocked down by their young children when fighting with them and a quarter got hurt when playing football or climbing trees with them. In fact, one ____ five young fathers picked up an injury when doing something that wasn't suitable for them.
The research also found that some of the fathers who were ____ (serious)injured had to take time off work. ____,not all of them had medical insurance(保险)in place ____ (prevent)the case that they were too ill to work. And they were more likely to face a situation ____their mobile phones and holiday bookings declined sharply during illness. So the fathers took much ____ (press)from both the family and the work.
