21)Complaints were sent to the head office.
22)200 people are employed by the company.
23)He hopes visa will be given to him soon.
24)This room is used only on special occasions.
25)Our car was stopped, because we were driving too fast.
26)I wasn't suprised that was being listened with such interest.
27)Our piano is being tuned.
28)the lights are being switched off, the floors are being cleaned, the tables are being layed.
29) ... , the last student was being examined.
30)The exhebition was being opened, when... .