Had I known about this computer program, a huge amount of time and energy       .
#87058
A
would have been saved
B
had been saved
C
will be saved
D
was saved
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      , the forest fire would have been discovered much earlier.
#87801
A
But for their care
B
Had they been more careful
C
Without their care
D
If they were careful
He       have come here yesterday,        he?
#89653
A
mustn’t;did
B
couldn’t;has
C
mustn’t;haven’t
D
must;didn’t