A little snail(蜗牛) felt tired from carrying his shell all day. He asked his mother, "Mom, why do we have to carry our shells?"

    His mother told him, "Because we don't have any bones(骨头) in our body. We can only crawl(爬). The hard shell not only helps us move faster but also protect us."
The little snail was still puzzled, "Caterpillars(蝴蝶的幼虫) don't have bones, either. They can't even crawl. But they don't need to carry heavy shells."
The mother smiled and said, "Caterpillars turn into butterflies when they grow up. The sky will protect them."
"How about earthworms? They don't have bones, they don't crawl fast and they don't turn into butterflies. And they don't have to carry heavy shells." The mother told him, "Earthworms live underground and the land protects them."
The little snail started to cry, "How poor we are!" The mother snail comforted(安慰) him, "That's why we have shells! We don't depend on the sky. We don't depend on the land. We depend on ourselves."
【小题1】The little snail carried his shell all day, so he felt .

A．sad

B．tired

C．bored

D．silly

【小题2】Why does the snail have to carry his shell? Because .

A．he can crawl	B．the shell is heavy
C．he can't fly	D．the shell is helpful

【小题3】What's the meaning of the word "puzzled" in Chinese?

A．疑惑不解的.

B．难过的.

C．犹豫不决的.

D．烦心的.

【小题4】After the little snail talked to his mother, he might .

A．hate the shell	B．depend on his mother
C．be pleased with his shell	D．be worried about his shell

【小题5】In this passage, the writer wants to tell us .

A．we may ask others for help

B．the mother is the only person that we can believe

C．we depend on the sky and the land

D．we must depend on ourselves