The question of ________ first saw the continent of America is still unsettled.
The question of ________ first saw the continent of America is still unsettled.
A.the person
B.who
C.whoever
D.whom
答案及解析： B
The question of ________ first saw the continent of America is still unsettled.
A.the person
B.who
C.whoever
D.whom
答案及解析： B