11.5 Once_____,everyone taking the examination will be given test papers.Once_____,everyone taking the examination will be given test papers.A.seated B.seating C.being seated D.having seated 为什么不能选C,现在分词做状语,而且sb be seate

11.5 Once_____,everyone taking the examination will be given test papers.Once_____,everyone taking the examination will be given test papers.A.seated B.seating C.being seated D.having seated 为什么不能选C,现在分词做状语,而且sb be seate I once_____(have)a dream of being a teacher. every. every every every “every every every Eg:The research is so designed that once_____ nothing can be done to change it.A begins Bhaving begun C begining D begun.Why choose Once_____ oxygen ,the brain dies .A:deprived of B:depriving ofC:having deprived of D:deprived该怎么选呢 还有这里的once怎么理解呢 every year in every Every where,every minute! every fouch every 英语语法填空有一题Mom is in her seventies,and those hands I once_____(think)to be so rough are stil doing things for me and my family.为什么不能用have thought 而一定要用thought. 较真下英语选择题222222222222222222222222222Teachers usually get paid once_____ monthA.a B.the C.an D.不填month不是月份吗,还加冠词是不是得看前边是不是短语啊 happy every happy every