根据短文内容和所给的首字母，写出短文中所缺的单词，使短文完整，合乎情景。

       The mobile phone is a useful thing, but maybe I don't know h    1      to use it. Sometimes it makes things

difficult for me.

       One day I wanted to see my friend nearby. I could a    2     at his house in five minutes, but I looked at my

mobile phone and thought i     3     would be better to ring him up. I r    4     him for the first time, but the line

was busy. Five minutes later, there was an answer, but it was the wrong number. Then I tried a    5    and this

time I got an answer from him.

       I asked him i    6    he was at home in the afternoon. And he said he would be at home all afternoon. So

I went to his house, but then I found n    7     in. I called him for the fourth time. This time I got so angry that

I s     8     , "You are not at home? But you just told me over the telephone that you would be at home all

afternoon!"

       Here w    9     his answer, "No, I said: 'I will NOT be at home all afternoon.' "I went back to my room,

sat down in front of the mobile phone and looked at it. What e    10     could I do? Nothing!