题目内容：

    The crocodile (鳄鱼) is an amazing animal. Why are they amazing? Crocodiles are experts at survival. Scientists say they first appeared 200 million years ago and have lived longer than the dinosaurs by some 65 million years. One reason why they are such good survivors is that they can go for a very long time without eating. And they are expert hunters! They use their strong jaws to bite their prey (猎物) and then they swallow food whole. Another amazing fact about crocodiles is: When they lose a tooth, they grow one right back. A crocodile can go through 8,000 teeth in one lifetime!

While these facts are interesting, they really do not help to explain today’s expression: crocodile tears. Simply put, crocodile tears are fake sadness. You pretend to cry and feel bad or something when in fact you could not care less. A great word to describe crocodile tears is insincere.

The expression “crocodile tears” comes from an old story that crocodiles would cry tears as a fake show of guilt or sorrow to trick their prey. The prey would come closer and then become dinner. We know now that the story is not true. Scientists explain that crocodiles do produce tears. That is because while eating, they swallow too much air; which gets in touch with lachrymal glands (glands that produce tears) and forces tears to flow. But they’re not actually crying. Crying is purely emotional and is reserved for us humans.

When you use it, take some advice. You do not have to have actual tears flowing down your face to have “crocodile tears”. Sometimes, crocodile tears are worse than insincere. Those are the times when you are showing sadness but actually in your heart, you are quite happy about the situation.

1.How does the author mainly show that crocodiles are amazing?

A.By telling stories. B.By giving examples.

C.By conducting experiments. D.By making comparisons.

2.“Crocodile tears” is often said to a person who________ .

A.has some insincere friends B.faces sorrowful situations

C.shows unreal sadness D.cares little about others

3.Why does a crocodile produce tears according to scientists?

A.The flow of its tears makes it appealing. B.It pretends to be guilty to trick its prey.

C.It wants to show its emotional feelings. D.The way it eats forces its tears to flow.

4.What is the best title for the text?

A.An Expression — “Crocodile Tears” B.What Crocodiles Actually Cry for

C.Unknown Facts About Crocodiles D.How Crocodiles Show Sadness