It was cold_______ they had fun. (because/ or/ but)
but
Rob went to the zoo ________ it was his birthday. (so/ and/ because)
because
He took his friend ________ he was not lonely. (because/ so/ or)
so
They saw snakes______ monkeys. (so/ and/ while)
and
They looked at the animals _______ they walked around. (while/ so/ but)
while
Shall we go home______ shall we look at more animals? (but/ so/ or)
or