根据首字母提示写单词
1、Before you enter the teacher's office ,you should k_____ on the door first.
2、Bill Gates is a very r____ man in the world.He has billions of dollar
3、Mr.Gao is eighty years old,but he has some m_____ ideas.
4、Yan Liwei and Zhan Tianyou are national h______.
5、Some people are p_____ flowers in the garden.