I couldn't understand（） the baby alone.A.why she left B.why did _英语解答

I couldn't understand（） the baby alone.
A.why she left B.why did she leave C.why had she left
D.why she had left

人气：289 ℃　时间：2020-03-25 22:36:51

解答

A、 D正确
从句后要用陈述语序
B、C后都不是
D 表示的是过去完成时（had+动词过去分词）