1.baggage,trolley
2.check-in,boarding
3.electronic,leave,reservetion,price,credit
4.charged,excess
5.security,rid of,sharp,liquids
6.pay,accepts.
7.through,busy,call
8.money,borrow
9.PIN,insert
10.swallows,cash
10.domestic,country
1 travelling
2 visiting
3 reading
4 hearing
5 smiling
6 buying
7 joining
8 going
9 building
10 working, entering
36.)Computers are used by students at their lessons.
37.)The rules of the game were explained to the students by the teacher.
38.)The office will be cleaned tomorrow.