4 предложения в Present Perfect

1. They have finished the project A-20 this week - Они завершили проект А-20 на этой неделе

2. I have used this computer since 2010 - Я пользуюсь этим компьютером с 2010 года

3. She has lived in England for three month - Она жила в Англии 3 месяца

4. you have already been in Prague - Вы уже были в Праге

I have been to Greece.

The signal has to travel over three billion miles.

I have lost my keys.

I have never visited France.