So extraordianry __________ that it left a deep impression on visitors.
#82784
A
was the Shanghai 2010 Expo
B
the Shanghai 2010 Expo was
C
did the Shanghai 2010 Expo
D
the Shanghai 2010 Expo did
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Not until his father died _______ what his father really meant. 
#80821
A
do they realize
B
did they realize
C
realized they
D
had they realized
Out _______ from the yard and we were all frightened.
#83758
A
a huge dog rushed
B
rushed a huge dog
C
did a huge dog rush
D
had a huge dog rushed
 For a moment nothing happened.Then ________ all shouting together.
#79829
A
voices had come
B
came voices
C
voices would come
D
did voices come