Mankind must first of all eat, drink, have shelter and clothing______ it can pursue politics, science, art, religion, etc.
You will hardly believe it, but this is the third time tonight someone______me.
This method saved half the labor that______to combat the insects separately.
A．would not have been needed
B．would have been needed
C．would not have needed
D．would have needed
I______the woman who wears a red T-shirt somewhere before.
B．to have seen
The set of answers which everyone was given______carefully checked by the supervisor.
Only about one out of twelve young men and women of this country______ a college education.
At present a large number of people______the worst danger from automobiles is accidents and not pollution.
Everyone of the salesmen who are waiting______that his products will be the ones selected.
Seven-eighths of the food at the cocktail party______gone even before the party really began.
The staff of the university______having difficulties agreeing on their goals for the year.