Did my mom call me 10 minutes ago?
Why did my mother call me 10 minutes ago?
Did my mother or my sister call me 10 minutes ago?
Who call me 10 minutes ago?
my mother called me 10 minutes ago, didn't she?
My mother didn't call me 10 minutes ago, did she?
Is the alpinist is climbing the mountain?
Is the alpinist climbing a mountain or a cliff?
Who climbing a mountain?
Is the alpinist is climbing the mountain, isn't he|it?
the alpinist isn'n climbing the mountain, is he|it?