Question

10. I've been so busy that I haven't
slept ... two days!
a) for
b) since
11. We're ready to leave. In fact, we've
been ready ... an hour.
a) for
b) since
12. Sam and Martha have owned their
new car ... April.
a) for
b) since
13. I haven't watched TV ... the day
before yesterday.
a) for
b) since
14. Isabella hasn't ridden her bicycle
... she fell off it last week.
a) for
b) since
15. I'm really hungry! I haven't eaten
... this morning.
a) for
b) since
16. Iceland has been inhabited ... only
about a thousand years.
a) for
b) since
17. My neighbors have been away on
holiday ... several weeks.
a) for
b) since
18. Our universe has existed ... billions
of years.
a) for
b) since

Answer 1

Respuesta:

10. for

11. since

12. since

13. since

14. since

15. since

16. for

17. for

18. for

Explicación: