—Do you think it wise for Chinese mothers to try to do everything for their children?

—No, that’s _____ they are mistaken.[ ]

A. where

B. when

C. in which

D. what

以下对北京名称按先后顺序排列正确的是( )。

A．燕京、涿郡、幽州、北平

B．涿郡、燕京、京师、大都

C．燕京、涿郡、南京、幽州

D．幽州、涿郡、北平、北京