根据括号中所给的汉语写出单词，使句子意思完整正确。
小题1:There’s something wrong with my computer. I have to （重启） it.
小题2:Simon wants to have a robot with four small （轮子）.
小题3:I want to go to the bookshop. Could you （借） me your bike?
小题4:The young mother told her child not to play with the （锋利的） knife.
小题5:Everyone should try to be _________（有礼貌的） and helpful to others.