请用恰当的介词填空
【小题1】__________ production up by 60%, the company has had another excellent year.
【小题2】In his factory, the workers are now paid __________ the season.
【小题3】She looks quite young __________ her age.
【小题4】They changed their blue shirts __________ the white ones.
【小题5】Teachers should prove worthy __________ the people’s trust.
【小题6】He has been caught in the rain and is wet __________ the skin.
【小题7】I am tired __________ climbing up the mountain and I won’t go climbing any more.
【小题8】As students, it is necessary to stop __________ weekly intervals and go back over key points in the lesson.
【小题9】Make sure the car is locked because leaving it unlocked is an open invitation __________ thieves.
【小题10】The doctor tried to laugh my mother __________ her fears about the operation.