题目内容：

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Scientists say crocodiles have outlived dinosaurs 1.some 65 million years. One reason why they are such good 2. (survive) is that they can go for a very long time without eating. And they are expert hunters,3.(use) their strong jaws to bite their prey(猎物) and then swallow it whole. When they lose a tooth they grow one right back. A crocodile can go through 8,000 4.(tooth) in one lifetime!

What does the expression “crocodile tears” mean? Simply put, “crocodile tears” are fake sadness. You pretend 5.(cry) and feel bad for something when in fact you could not care 6.(little). A great word to describe it is insincere. The phrase “crocodile tears” comes from an old myth that crocodiles would shed tears while eating their prey. A religious worker wrote that 7. a crocodile found a man by the water, it would kill him if it could. Then the crocodile would cry tears on the man, but then finally swallow 8.(he). Another myth suggests9.crocodile is very clever indeed. Crocodiles, the story goes, would cry tears as a false show of guilt or sadness to trick their prey. The prey would come closer and then become dinner.

Scientists explain that crocodiles DO create tears, but they do not cry. The tears help to clean their eyes. Crying is purely emotional and it 10. (reserve) for us humans.