1 to ask about
2 to move quickly above the surface without touching it
3 something that stores and supplies electricity
5 someone who travels a long way to work and back
7 1) extremely good; 2) not yet paid or completed
8 the place that an event is happening
10 a piece of equipment that is a sealed unit and that can be taken out and replaced
11 report or open letter giving information of interest to a special group
13 work done in addition to regular working hours
17 someone who gives an opinion on what to do
18 from one day's evening to the next morning