选择适当的句子填入空白,使对话完整。(其中有两项是多余的) |
a. What is it used for? b. May I ask you a question? c. Sorry. d. What is it used for? e. I think f. What is it? g. Do you know A: Hello, Peter! 1. B: Certainly! 2. A: Which of these do you think is the most useful invention, a computer, a telephone or a television? B: 3. the most useful one is a computer. A: Why is that? B: Oh, I think it can help us work and play. A: 4. when it was invented? B: 5. , I don't know. |