My mother went to bed early,---she felt very tiredA or Bso Cfor Dyet
问题描述：
My mother went to bed early,---she felt very tired
A or Bso Cfor Dyet
答
选C，表因为
答
for 表示间接的原因推断
答
C
因为（原因状语从句）
不明白的再问哟,请及时采纳,多谢!
答
选 C for 因为
祝你开心。