题干
_______ I walked into class, the teacher had started teaching already.
A：By the time
B：While
C：After
D：Because
答案(点此获取答案解析）
A
_______ I walked into class, the teacher had started teaching already.
A：By the time
B：While
C：After
D：Because
《语书》中，凡是“正”字都写成“端”字（如：以矫端民心；毋公端之心），这一现象与我国封建社会的避讳制度有关。据此判断，这批竹简应属于下列哪一朝代