Ответ:

  1. I phoned while you were watching your new DVD.
  2. I wasn’t studying when James arrived.
  3. When I saw them, they were standing in the car park.
  4. While I was looking at pictures in the museum, someone called my name.
  5. The taxi came while my dad was working.
  6. В шестом предложении глагол для заполнения не указан, а окончание предложения обрезано. Пришлите его целиком, чтобы можно было заполнить пропуск.