作业帮_______(恐龙灭绝了）long before people appeared on the earth.
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_______(恐龙灭绝了）long before people appeared on the earth.
_______(恐龙灭绝了）long before people appeared on the earth.
_______(恐龙灭绝了）long before people appeared on the earth.
The dinosaurs have been dead off
The dinosaur had been extinctive
_______(恐龙灭绝了）long before people appeared on the earth.
恐龙灭绝了吗
为什么恐龙灭绝了?
为什么恐龙灭绝了
恐龙咋灭绝了
为什么与恐龙同时代的生物（如：鳄鱼）不灭绝?而恐龙灭绝了呢?
恐龙灭绝了吗?为什么?
为什么恐龙灭绝了呢?
恐龙灭绝了,人类诞生了.人类灭绝了呢?
上地球恐龙怎么会灭绝呢恐龙灭绝有多少年了?怎么会灭绝吗
6500万年前恐龙为什么灭绝了
恐龙为什么会灭绝了呢?
恐龙为什么会突然灭绝了?
为什么世界的恐龙都灭绝了?
为什么地球上的恐龙灭绝了?
什么动物见证了恐龙灭绝
恐龙灭绝后什么生存下来了?
恐龙怎样灭绝的作文,(说明文）.