问题
选择题
All the photographs in this book, ________ stated otherwise, date from the 1950s. [ ]
A. unless
B. until
C. once
D. if
答案
答案：A
搜题请搜索小程序“爱下问搜题”
All the photographs in this book, ________ stated otherwise, date from the 1950s. [ ]
A. unless
B. until
C. once
D. if
答案：A