问题
The little child usually felt frightened at night, so not until ___________.
A:did he fall asleep his mother left the room
B:he fell asleep had his mother left the room
C:did he fall asleep did his mother leave the room
D:he fell asleep did his mother leave the room
B:he fell asleep had his mother left the room
C:did he fall asleep did his mother leave the room
D:he fell asleep did his mother leave the room
正确答案是：
同类题型
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