It is no use _________ to persuade him ________ smoking because he has been addicted to it since he wasyoung.
Living in a big city has many _____, such as good schools, libraries and convenient traffic.
Father _____ goes to the gym with us although he dislikes going there.
– I’m very tired.– We really should stop _____.
WHO is short _____ the World Health Organization.
I soon found that the work I was doing had already been done, _____, I was wasting my time.