Only after the woman had her own child ______how difficult it was to be a mother. 
#81791
A
she realized
B
had she realized
C
she had realized
D
did she realize
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 Not until then _____ their marriage was breaking up because they had little in common.
#83081
A
did I realize
B
I realized
C
had I realize
D
has I realized
Not until he went abroad to further his study_______ the importance of English.
#82848
A
has he found
B
he has found
C
did he find
D
he had found
The door burst open and ________,shouting with anger.
#79523
A
in rushed the crowd 
B
rushed in the crowd
C
the crowd in rushed 
D
in the crowd rushed
I finally got the job I dreamed about. Never in all my life ________ so happy! 
#84295
A
did I feel
B
I felt
C
I had felt
D
had I felt