The exhibition held twice every year.这句话对吗

The exhibition held twice every year.这句话对吗 The exhibition is/was held twice every year?这句话对吗? The exhibition held twice every year.需要加is? The exhibition is/was held twice every year?哪个对? The exhibition is held twice every year.是被动语态吗? which times a year is the festival held这句话对吗? This is the museum that the exhibition was held.其中that对吗,是不是 We have a Art Festival every year.这句话对吗? He has gone to Hongkong twice.last year.这句话对吗? He has gone to Hongkong twice.last year.这句话对吗 the exhibition was held.这句被动语态是哪种基本句型?主+谓+? 这句话对吗!The 16th Asian Games was held in Guangzhou China in 20