1.I knew/have known Jenny since we were little children

2.I lived/have lived in Peru for four years

3.While I have waited/was waiting for the train,I met an old friend

4.I was surprised when he called me,becasue I didnt hear/hadnt heard from him for almost ten years

5. I surfed/was surfing the internet when my computer started giving off a strange smell

6.I didnt want any dinner because I already ate/had already eaten a large lunch earlier in the day .

7.I wasnt knowing/didnt know what to do with the money so i gave it to charity

8.I havent met/hadnt met him before so was surprised when he started talking to me like an old friend

9Suddenly,I slipped/was slipping on a banana skin​