______ you call me to say you’re not coming, I’ll keep waiting for you at the theatre.

. --- My son is addicted to drugs. He isn’t hopeless, is he?--- Yes, ______ he mends his way and starts all over.

Goals have to be realistic ________ students can reach them and feel a sense of achievement.

His promise ___ he would marry her when he came back turned out to be a lie, ___ left the girl heart-broken．

 —How long has John been here? — Two years, _______ he still has no friends.