we were going on a picnic, ___it started to rain.
but
Would you like blueberries _____ blackberries.
or
His shirt was black _____ red with a number on it.
and
She loves coffee, ____ but she doesn't like tea.
but
She likes candy _____ cupcake.
and
Jimmy bought me a gift _____ it is my birthday.
because
I was feeling tired, ____ I took a nap.
so