The first crocodiles(鳄鱼) lived on the Earth about 240 million years ago. How much do you know about these dangerous animals? Here are some amazing facts about them.
◆ The biggest crocodile is the saltwater crocodile. It can be as long as seven metres!
◆ If you take a bright light at night over a river with crocodiles inside, you will see pairs of red spots (点). Those are the crocodiles’ eyes. They can see well at night.
◆ When you see a crocodile with its mouth open, don’t be scared. That just tells you it’s too hot.
◆ On the beach, crocodiles get tired very quickly, but they can stay in the water for 2-3 hours.
◆ Most crocodiles can live up to 70 years old!
小题1: When did the first crocodiles live?

A．About 2,400,000,000 years ago.	B．About 240,000,000 years ago.
C．About 24,000,000 years ago.	D．About 2,400,000 years ago.

小题2:The writer thinks the crocodile is 　　     .

A．lovely	B．dangerous
C．fun	D．cool

小题3: What’s the meaning of the underlined word “scared”?

A．Happy.	B．Sad.
C．Comfortable.	D．Afraid.

小题4: Which of the following is right?

A．Crocodiles often open their mouths when it’s hot.

B．Crocodiles can stay on the beach for 2-3 hours.

C．All the crocodiles can live up to 70 years old.

D．The writer talks about four facts about crocodiles.