Don't be frightened by sharks：you are by a shark.

不要被鲨鱼吓倒：你被雷击的可能性比被鲨鱼攻击的可能性大30倍。

2．强调句

However， they found their greatest use.

然而，正是在战争中他们才发现了鸽子的最大用途。

Ⅰ.课文阅读理解

1．Which of the following statements is TRUE about sharks?

A．Among nearly 400 different types of sharks，only about 30 types attack human beings.

B．The most dangerous sharks are the tiger shark and the bull shark.

C．The shark's attack is the leading cause of people's death in the sea.

D．The chance of being attacked by sharks is rather small compared to other dangers.

2．Which of the following ways can help you out of the attacks from sharks?

A．No swimming in the dark，especially alone at night.

B．The fewer people，the fewer chances to be attacked by sharks.

C．Wearing colourful clothing.

D．Swimming when you have a fresh wound.

3． is the way to save you out of a shark attack.

A．To keep still，not to make the shark angry

B．To pull aside the shark's jaws to pull yourself out of its mouth

C．To hit the shark on the head to drive it away

D．To hit the shark on the nose

4．Why does an officer write a short message quickly on a small piece of paper?

A．Because he wants to test his soldiers' abilities of writing.

B．Because he intends to practice his handwriting.

C．Because he wants to get help.

D．Because he tries to get a pigeon.

5．When did they find the use of the pigeons?

A．In the quiet night.　　　　　 B．In war.

C．At home. D．In the cage.

6．How do pigeons find their way?

A．They appear to have a compass inside them.