问题
选择题
The school rule states that no child shall be，unless________by an adult，allowed out of the school during the day.
A．was accompanied
B．accompanying
C．accompanied
D．being accompanied
答案
答案：C
答案 C [此处为省略句。accompany与逻辑主语child之间存在被动关系，相当于unless he is accompanied by an adult。]