All the photographs in this album. stated otherwise.date from the 18th century．( )A．untilB．unlessC．onceD．while 题目和参考答案——青夏教育精英家教网——

题目内容

17．All the photographs in this album， stated otherwise，date from the 18^th century．（　　）

A．

until

B．

unless

C．

once

D．

while

分析这本相册里所有的照片，特别说明的除外，都来自十八世纪．

解答答案：B
until直到；unless除非；once一旦；while然而，却．题干中，主句中间stated otherwise是动词短语，要填连词构成复合句；state与photographs构成被动关系，系动词省略了；otherwise其它方面，否则，表示是从所有相片中把某些特殊的去掉，补全完整的从句是unless the photographs are stated otherwise，unless表示除非，如果不，如果没有，符合句意．故选B．

点评本题考查了从属连词unless引导的省略句，比较难．省略句的省略的部分是和主句相同的主语和系动词，也可以是it is，解题是要特别小心．

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