来自毕远国的问题
Catherin______(finish)theletterbeforehermothercameintoherbedroom.
Catherin______(finish)theletterbeforehermothercameintoherbedroom.


Catherin______(finish)theletterbeforehermothercameintoherbedroom.
Catherin______(finish)theletterbeforehermothercameintoherbedroom.
hadfinished用过去完成时