Exercises with adverbs since, for, ago

1I haven't seen him  forsinceago five years.

2  SinceForAgo I came to London, you haven't called me.

3 We were at his home just five minutes  foragosince .

4 I haven't eaten anything  agoforsince early morning.

5 I've been living in New York  forsinceago two years.

6 My brother usually practices the piano  sinceforago a couple of hours every afternoon.

7 We have been waiting for them  sinceforago three o'clock.

8 Richard finished his studies three years  sinceforago .

9 The Eiffel Tower was constructed more than one century  sinceagofor .

10 I haven't studied French  sinceforago 1997.