Odpowiedź:
Zadanie 1:
1. for
2. since
3. since
4. for
Zadanie 2:
1. John has been teaching english for three years.
2. I'm not eating meat since last july.
3. You are living in Warsaw since 2015.
4. My friends did not go backpacking since last year.
5. They are studying english for six years.
