英语翻译The ----old man said to his sons in a low voide.(A)die (

英语翻译
The ＿＿＿＿old man said to his sons in a low voide.
(A)die (B)dying (C)dead (D)death
old 前应选ABCD 哪个
附上理由
My sister ----in bed reading when she was a pupil
(A)whill stay (B)would stay (C)was staying (D)stay