Not until the child fell asleep_______leave the room. 
#72153
A
did the mother
B
does the mother
C
was the mother
D
is the mother
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He likes to use words _________ is clear to her.
#73406
A
of which the meaning
B
of which meaning
C
of whose meaning
D
meaning of which
________, I could not memorize the text.
#69938
A
However hard did I try
B
However hard I tried
C
However I tried hard
D
However I had tried hard