1. 用just, already, yet, have been to或 have gone to 填空完成句子。

1. （1） — Where's Lucy? 

   — She  a restaurant for lunch. She will be back in fifteen minutes.

3. （2） — How many times  you  Disneyland?

   — Twice. I went there in 1995 and 2010.

5. （3） — Have you watered the flowers?

   — Sorry, not .

7. （4） Look! This room is so clean because I have  cleaned it.

9. （5） — Can I go to Japan with you tomorrow, Dad?

   — But you have  been there for many times. Give your brother a chance, too.