The plural of boat is boats. Which of these are correct plurals?

1.   ?    ladys
2.   ?    minuts
3.   ?    sandwichs
4.   ?    babies

The plural of mouse is ____, of goose its is ____

1.   ?    mouses, gooses
2.   ?    mice, gooses
3.   ?    mouses, geese
4.   ?    mice, geese

Throw away your old tooth brush and buy a few new ____

1.   ?    teeth brush
2.   ?    tooth brushes
3.   ?    teeth brushes

Tired of your old fashioned scarf? Buy new and fashionable ____

1.   ?    scarfs
2.   ?    scarves

My family ____ thinking of moving to Oxford.

1.   ?    is
2.   ?    are
3.   ?    both are correct

Lately the police ____ several drug dealers.

1.   ?    has arrested
2.   ?    have arrested