31 Fill in at, in, on, for, of, then make sentences using the phrases. 1 ....... ... patrol; 2.... all levels; 3 a day the life of; 4 under cover ........... darkness; 5 to look evidence; 6 years training; 7 to speak public; 8 to be late work; 9 .... the force 10 to prepare .... work; 11 the position ..... ski instructor; 12 to have experience doing sth 13 to come an interview; 14 general