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

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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
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 seated也是对的呀
怎么是省略句了？为什么要省略？

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
1.答案：A.
2.翻译：一旦落座,每一个参加考试的人将会被给予试卷.
3.
1）once在此题中意思是“一旦”,引导条件状语从句.但是该从句却没有主语,说明它采用了省略的语法.
2）状语从句的省略规定如下：如果状语从句的主语是it或与主句主语相同,且状语从句的谓语动词以be动词开头,则可以把状语从句的主语和be动词一起省略.
该语法现象在高中阶段常见常考.
即：Once seated = Once everyone is seated.
3）如果选C,则变成Once everyone is being seated,“一旦每个人正在就座”,句意不通.

这是个省略句，需要同时省略主谓语（sb be）

同意mikechang77的答案。

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