Only when Michael had his own child ____ making a kid grow up healthily was too hard. 
#81454
A
he realized
B
had he realized
C
did he realize
D
he had realized
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I don't like feeding the animals, but I need money, so ________.
#79868
A
it is there
B
there is it
C
there it is
D
that it is
If _____ carefully, the experiment will be successful.
#84616
A
do
B
does
C
done
D
doing
_____ English that I couldn’t follow her.
#81149
A
So did fast the native speak
B
So fast did the native speak
C
Did the native speak so fast
D
So fast the native did speak