I was going to take a photo of the world-famous painting when I noticed a saying “No Photographing”.
A. signal
B. sign
C. sigh
D. spelling
网友回答
A. signal
(答案→)B. sign
C. sigh
D. spelling
解析：名词辨析。sign标志;标牌手势;暗号; 征兆; signal信号；sigh叹气,叹息spelling拼写；句意：我正要拍那幅名画，在这时我注意到一个牌子，上面写着：不准拍照。