Usually children are allowed to when they are six years old.A. attend schoolB. attend the

问题补充：

Usually children are allowed to when they are six years old.

A. attend school

B. attend the school

C. join school

D. join the school

答案：

(答案→)A. attend school

B. attend the school

C. join school

D. join the school

解析：本题考查动词和冠词。attend school = go to school，其中的school不表示具体的“学校”，而是表示“上学”这一抽象概念，因此school前不可加定冠词。