When is a horse not a horse? When it is a sea horse. The sea horse is a small fish. It likes warm water. A sea horse always stands up in the water when it swims.

The father sea horse carries the eggs to keep them safe until they hatch. Then the baby sea horses swim away.

1.What is a sea horse?

A It’s a small horse.

B It’s a small fish.

C It’s a big fish.

D It’s a big horse.

解析：选B。B细节理解题。根据“The sea horse is a small fish.”可知，海马是一种很小的鱼。故选B。

2.What does a sea horse like?

A It likes cold water.

B It likes hot water.

C It likes warm water.

D It likes cool water.

解析：选C。C细节理解题。根据“It likes warm water.”可知，它喜欢温暖的水。故选C。

3.What does a sea horse always do in the water when it swims?

A It always stands up.

B It always sleeps.

C It always jumps.

D It always sings.

解析：选A。A细节理解题。根据“A sea horse always stands up in the water when it swims.”可知，海马总是站在水里面游泳。故选A。

4.The underlined(画线) word “them” refers to(指的是) ____________.

A horses

B babies

C eggs

D fishes

解析：选C。C词意指代题。根据划线部分前面的“The father sea horse carries the eggs”可知，海马爸爸带着蛋直到它们孵化保证它们的安全，因此这个them指的是这些蛋。故选C。