根据汉语完成句子
【小题1】看!现在四班的学生正在做物理实验。
Look! The students in Class Four are doing ____________ ____________ now.
【小题2】请你帮我把瓶子里装满水，好吗?
Could you please help me ____________ the bottle ____________ water?
【小题3】我的收音机坏了，但我找不到问题所在。
There is something wrong with my radio， but I can't ____________ ____________ where the problem is.
【小题4】父母们经常在学习上把他们的孩子和其他孩子相比较。
Parents often ____________ their children ____________ other children in study.
【小题5】这首优美的歌曲受所有年龄段的人欢迎。
The beautiful song is popular among the people ____________ ____________ ____________ .