Question

Not until about 20 000 BC _________ done．

[　　]

A．

were known of the oldest paintings

B．

the oldest of known paintings were

C．

the oldest known were paintings

D．

were the oldest known paintings

Answer 1

答案：D
解析：

not until置于句首，主句用部分倒装，were要提到主语the oldest known paintings前面。