Another food crop raised by Indians______strange to the European was called Indian corn.
A. who were
B. that were
C. that was
D. who was
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They helped us time and again,______very kind of them.
A. who were
B. which was
C. that was
D. which were
Those guilty of a serious crime_______refuseto reform must be severely punished.
A. which
B. whom
C. when
D. who
Many critics agree that the novel is an art form_______womenexcel.
A. to which
B. of which
C. by which
D. in which
We assume that the meanings of these underwater sounds are similar to those _______we are familiar on land.
A. to which
B. with whom
C. with that
D. with which