问题补充:
The sign on the right tells us taking photos here.
A. is allowed
B. isn’t allowed
C. are allowed
D. aren’t allowed
答案:
A. is allowed
B. isn’t allowed
C. are allowed
D. aren’t allowed
解析:考查动词语态。。句意 右边的标示牌告诉我们,禁止照相。Allow doing sth 禁止做某事,考查这个短语的被动语态,并且doing做主语谓语动词用单数形式故选B 项。