We have the most population in the world, and most of it _______ farmers.
#103586
A
to be
B
is
C
are
D
being
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 Everything he _____ to his country.
#103067
A
had was contributed
B
had been contributed
C
had to be contributed
D
had contributed
 We will lose the game unless he ______ us. 
#103226
A
helps
B
helped
C
was helping
D
has helped
She said her grandmother ______ in 1937.
#99032
A
had been born
B
was born
C
was died
D
had died