Parents need to teach their children how to behave______.
Most birds find it safe to sleep in the trees, but ________they have eggs or young chicks, they don’t use a nest.
You will be successful in the interviewyou have confidence.
I won’t call you, ________ something unexpected happens.
_______,his idea was accepted by all the people at the meeting.
Many of them turned a deaf ear to his advice, _______ they knew it to be valuable.