短文填空。 The mobile phone is a useful thing, but maybe I don't know (1)h to use it. Sometimes it makes things difficult for me. One day I wanted to see my friend nearby. I could (2)a at his house in five minutes, but I looked at my mobile phone and thought (3)i would be better to ring him up. I (4)r 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 (5)a and this time I got an answer from him. I asked him if he was at home in the afternoon. And he said-at (6)1 I thought he said he would be at home all afternoon. So I went to his house, but then I found (7)n in. I called him for the fourth time. This time I got so angry that I (8)s , 'You are not at home? But you just told me over the telephone that you would be at home all afternoon!' Here (9)w 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 (10)e could I do? Nothing!