－Can you go to school in other clothes?－No. We to go into the school unless we are in sch

问题补充：

－Can you go to school in other clothes?

－No. We to go into the school unless we are in school uniforms.

A. allow

B. are allowed

C. are not allowed

D. allowed

答案：

A. allow

B. are allowed

(答案→)C. are not allowed

D. allowed

解析：本题回答语的含义是如果我们不穿校服上学，我们不允许到学校去。根据句意可知本题使用的是被动句的否定结构，结构为be not+过去分词，故本题选C。