根据句意和首字母提示完成单词
1.Edison was a great ＿（s开头）,and he invented more than one thousand things
2.I really want a ＿（r开头）.It can do a lot of work instead of me.
3.If you get into a diffcult＿(s开头),don't worry,we will help you.
4.My bike is broken.Could you help me ＿(m开头) it?
——sorry,I'm busy now.
5.when you are walking on the road,a car may＿(a开头) suddenly and hit you.you must be careful.