What do you know about the sea? Everybody knows that the sea looks beautiful when the sun is shining on it. But it becomes very terrible when there is a strong wind. If you study the map of the world, you’ll learn that about three quarters of the world is sea.

Have you ever been at sea? The sea is very deep. In some places the sea is much deeper. The highest mountain in the world is about 9 kilometers high while the deepest place of the sea is almost 11 kilometer deep.

The sea can be very cold. At the top of the sea the water may be warm.But if you go down it becomes colder and colder. In most places of the sea, there are lots of fishes and plants. Some live near the top of the sea. Others live deep down.

You know the sea water is salty. The water of Dead Sea is very salty. It is so salty that swimmers cannot sink! Fish cannot live in the Dead Sea! What a strange sea!

1.The land takes up______of the world.

A.25% B.75% C.30% D.45%

2.Which of the following is mentioned in this passage?

A.The sea looks beautiful when it is calm

B.The sea is 6 kilometers in depth on average (平均)

C.The sea becomes very horrific（可怕的） when there is a strong wind

D.The Dead Sea is so salty that nothing can live in it.

3.The deeper diver(潛水員)goes down in the sea，______

A.the more comfortable he feels B.the warmer he feels

C.the cooler he feels D.the colder he feels

4.What can we know from the passage?

A.Most of the plants and fishes live near the top of the sea

B.Some of the plants and fishes live near the top of the sea.

C.Few of the plants and fishes live near the top af the sea

D.Most of the plants and fishes live near deep down of the sea

5.Which of the following statements about the Dead Sea is NOT true?

A.There are many kinds of fishes in it

B.It is a safe place for the swimmers

C.No fish can be found in it

D.It is very salty

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