在线求指导：根据句意及首字母提示

根据句意及首字母提示写出所缺单词.
1.I am really a____ because I can't find my backpack.
2.I didn't c____ the early bus,so I had to wait for the next.
3.The s____ of the coffee is so good,and I want to drink one more cup.
4.—How many f____ do you have?
—I have ten.
5.Don't p____ to know what you don't know.