I failed again in the examination and only then _____ how much time I had wasted.
#82391
A
I realized
B
I had realized
C
did I realize
D
had I realized
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________ who had arrested him three times for carrying drugs.
#79785
A
Before George stood the policeman
B
Before George the policeman stood
C
Before the policeman stood George
D
Before George did the policeman stand
 Some of the _______suspects refused to answer and kept their mouths shut.
#84067
A
questioning
B
being questioned
C
questioned
D
to be questioned