Most snakes live on the ground. They move on their stomachs(腹部). Some snakes can swim, and some snakes can fly, but many snakes can climb trees.

Snakes use two things to climb trees. They use their bodies. They push hard against the tree. It is very difficult for them to do, and they take a long time. They are not very fast climbers.

Snakes also use their scales. Scales are small, hard pieces on a snake's skin. Some snake scales are smooth(光滑的) and flat. Other snake scales are not smooth. They are rough. Scales that are rough can stick to tree bark(樹皮), so the snake can hold(抓住) on better.

Snakes only climb trees to eat eggs and small animals.

1.How do snakes climb trees?

A.They move on their stomachs. B.They use their bodies and scales

C.They climb with their skin D.They can push hard into the tree.

2.What does underlined word "scales" mean in the passage?

A.腹部 B.牙齒 C.鱗片 D.蛇皮

3.Why do snakes climb trees?

A.Because they want to be fast climbers B.Because they want to hold on tree bark

C.Because they want to smooth their scales. D.Because they want to get some food.

4.Where can you probably find this passage

A.In a science book. B.in an art book.

C.In a geography book. D.In a history book.

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