1.service2.safely3.return4.stationery5.salesman6.discuss7.prresent8.careless9.appear10.control11.remove12.control13.character14.store15.robot16.receive17.introduce1.go back 2.since 1998 3.noise pollution 4.take off 5.do sth by oneself 6.go on a holiday 7.on(in,at)the north of 8.be ...
