Find the word with the most general meaning in each line:
1)contract, certificate, license, document, declaration
2)computer, telephone, equipment, fax-machine, Xerox
3)control, examine, inspect, check
4)terminal, station, port of entry, airport
5)suitcase, rucksack, handbag, box, baggage
6)camera, X-ray machine, technology, metal detector, fiberscope
7)transport, aircraft, train, truck, ship
8)duty, payment, penalty, fine, tax
9)passenger, customer, broker, trader
10) ask, answer, explain, consult, inform, communicate