用動(dòng)詞的適當(dāng)形式填空。

  A: Peter, why do you look so tired?

  B: I (1)             (stay) online last night.

  A: Maybe you were online too long. You’d better (2)             (have) a good rest.

  B: Thank you. (3)             you ever             (be)online?

  A: No, I haven’t. Are you often online?

  B: Yes.

  A: What do you usually do online?

  B: Sending e-mails, playing games, talking with friends and so on.

  A: It must be very cool. Could you teach me how (4)             (search) the Internet?

  B: Sure. But I (5)            (feel) too tired now. I’11 teach you to do it some other day.

  A: Thanks a lot. By the way, don’t be online too long. It may be bad for your health.