Dela had made up his mind to give it up ,but on _____ second thought ,he determined to try ______ third time.
--- Does _____ of these two buses go to the station?--- You can’t get to the station by __________ of them.
—— Have you ever seen a whale alive?—— Yes, I’ve seen ___.
With so much water being used in the bathroom,it is no _____ that more environmentally friendly technologies have come out to make better use of water resources.
.Nothing but one desk and six chairs ________ in the room.
Tom has been out of work for two years, so he has difficulty______.