Mr. Bryan is a/an _______ secretary in our office, for he is able to do tasks successfully, without wasting time or energy.
Bird's singing is warning to other birds _______ away.
_______ with care, one tin will last for six weeks.
The old man sat in front of the television every evening, happy _______anything that happened to be on.
Tony lent me the money, __________that I’ d do as much for him .
Did I really hear someone come in or was it only a(an) ?