A science book gives facts. Some science books tell us about animals. Some tell us about plants. Some tell us about outer space. This page tells us about animals.
Do you know that not only the fish but also some animals live in the sea? For example, the whale is not a fish. It can't breathe in the water. It swims in the water. But it comes up for air.
The blue whale is the world's biggest animal. There are other sea animals, too. One is called the dolphin. Dolphins need air to live. They breathe air, as whales do. Dolphins are very clever. They sometimes seem to speak to each other.
Many other animals live near the sea. Seals (海豹) and otters（水獭）love the sea. They swim and play there, They eat smaller fish and sea plants. Seals and otters have thick fur. The fur keeps them warm.
The passage mainly tells us about _______.

A．fishes

B．plants

C．science

D．sea animals

Which of the sentences below is NOT true?

A．The whale can swim in the sea like a fish.

B．The whale can breathe in the sea like a fish.

C．Both whales and dolphins are sea animals.

D．Seals and otters like living near the sea.

What food do seals and otters like eating?

A．Only smaller fish.	B．Only sea plants.
C．Smaller fish and sea plants.	D．Blue whales and dolphins

Some sea animals can keep themselves warm because _______.

A．they are big animals	B．they like playing in the sea
C．they have thick fur	D．they eat enough food every day