题目内容:
Howdo archaeologists know that Neolithic men relied considerably on flint?
A.Theyhave found many fingerprints on tools made of it. B.Theyhave found holes that were dug with it.
C.Theyhave discovered many tools made of it.
D.Theyhave discovered it beside relics of Neolithic men.
参考答案:
答案解析: