阅读下面材料，在空白处填入适当的内容 (1个单词) 或括号内单词的正确形式。

    Many kinds of dinosaurs' bones  (find) recently by Chinese scientists in Nanyang, Henan Province. the scientists inspected the bones, they were surprised  (spot) these dinosaurs could not only run  the others but also climb the trees.

    Dinosaurs died  suddenly around 60 million years ago. Some scientists think  came after an  (expect) incident when a huge rock from space hit the earth  put too much dust into the air. Others think the earth got too hot for the dinosaurs to live on any  (much). Nobody knows  sure why and how dinosaurs disappeared from the earth in such a short time.