A dog usually wags its tail （擺尾巴） to show that it's friendly.The dog is saying， "I feel happy!" by wagging its tail.
    This dog is having fun.How do you know that？The dog's tail is in the air.Its ears are up.It looks like it is smiling.
    This dog is frightened.How do you know that？It is hiding （躲藏）.It is saying， "I feel afraid." Some dogs use other ways to show this kind of feeling.They may drop their tails between their legs.They may make their ears down.They may bark （叫）.These dogs are also saying，"I feel afraid."
    This dog is angry.How do you know that？It is making a deep sound.It is showing its teeth.And it may bite（咬） you，so never play with an angry dog.
    Young dogs like to play together.They may fight on the grass and bite each other.But don't worry.They just play this way.Dogs con also learn how to keep themselves safe when they fight.
    Now you know how to watch and listen to a dog.You can look at dogs' cars and tails.You can look at how dogs stand.You can listen to the sounds dogs make.Now you can understand how dogs "talk"!

（1）What does a dog usually do when it feels happy？

A

A

A．It wags its tail.
B．It drops its tail between its legs.
C．It makes a deep sound.
（2）According to the passage，how many ways do dogs use to show they are afraid？

C

C

A．Two.
B．Three.
C．Four.
（3）What does the underlined word "frightened" mean in Paragraph 3？

A

A

A．受驚的
B．疲憊的
C．興奮的
（4）Why does the writer tell us never to play with an angry dog？

C

C

A．Because it may make a deep sound.
B．Because it may show its teeth.
C．Because it may bite us.
（5）What is the best title of this passage？

C

C

A．What do dogs like？
B．What do dogs look like？
C．How do dogs "talk"？