单选题
Thomas Edison, ______, seemed to be awkward in his childhood.
A、
a great inventor
B、
was a great inventor
C、
a great inventor who
D、
who, as a great inventor
【正确答案】
A
【答案解析】
[解析] 同位语结构。本句已有的部分结构很完整，空白处可以填入定语、状语或同位语。所以只有A项正确，作为主语的同位语。故答案为A。
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