Let me tell you something about sharks. Sharks are among the oldest animals in the world. There are over four hundred and forty different kinds of sharks in the world. Whale sharks are about twelve metres long and live in the ocean.

Sharks can smell something in the water, for example, the blood of animals. That helps them find their food. Sharks mainly eat fish, other sharks and plants in the ocean.

Most sharks bite (咬) people by mistake. They think a person is a large sea animal. When the sun rises or goes down, sharks are looking for food. So at that time people shouldn’t go swimming in the ocean.

Today people kill sharks for food and their fins. The number of sharks in the world is dropping fast.

【小题1】How many kinds of sharks are there in the world?

A．Less than 440.

B．More than 440.

C．About 200.

D．Over 500.

【小题2】What do sharks mainly eat in the ocean?

A．Fish, other sharks and plants.	B．Only fish and plants.
C．Only other sharks and plants.	D．Only fish and other sharks.

【小题3】Why do most sharks bite people by mistake?

A．Because they think people are dangerous.

B．Because they think people are large sea animals.

C．Because they think people can hurt them.

D．Because they think people can take away their food.

【小题4】Why shouldn’t people go swimming in the ocean when the sun rises or goes down?

A．Because sharks are everywhere then.

B．Because water is cold then.

C．Because sharks are looking for food then.

D．Because sharks are looking for people then.

【小题5】How is the number of sharks in the world today?

A．It is dropping fast.	B．It is rising fast.
C．It is not changing.	D．We don’t know.