______ people have become masters of their country ____ science can really serve the people.
#93348
A
It is only then ;that
B
It is that;when
C
It is only when; that
D
It is when;when
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   so happened   I was there.
#94607
A
It;that
B
What;is
C
That;it
D
It;it
I ________ myself more—it was a perfect day.                        
#91903
A
shouldn’t have enjoyed
B
needn’t have enjoyed
C
wouldn’t have enjoyed
D
couldn’t have enjoyed