用所给词的适当形式填空
【小题1】It is said that all the work for the coming sports meeting is under __________ (prepare).
【小题2】The ancient vase is __________ (value), so you must take good care of it.
【小题3】Now that the __________ (technique) problems have been settled, we should get down to business.
【小题4】He journeyed __________ (frequent) to Paris and other places in Europe.
【小题5】A second study was performed in 1973 to update the __________ (origin) report.
【小题6】There has always been a close __________ (associate) between these two schools.