单选题
Fossils of
plant
that have
been extinct
for
fifty million years
have been found inlarge deposits of amber
near
the Baltic Se
A、
A. plantB. forC.fifty million yearsD.near
【正确答案】
A
【答案解析】
[解析] 与后面的have been extinct相搭配，此处的plant应是复数。
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