阅读短文，用适当的词填空，使短文意思完整。
The mobile phone is a useful thing, but maybe I don't know __1__ to use it. Sometimes it makes things
difficult for me.
One day I wanted to see my friend nearby. I could __2__ at his house in five minutes, but I looked at
my mobile phone and thought __3__ would be better to ring him up. I __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 __5__
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__ I thought he said-he would be
at home all afternoon. So I went to his house, but then I found __7__ in. I called him for the fourth time.
This time I got so angry that I __8__, "You are not at home? But you just told me over the telephone that
you would be at home all afternoon!"
Here __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 __10__ could I
do? Nothing!