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1·When he tried to climb the tree, it was very clear that the hippo didn't have wings to fly, or claws to climb with.

当他试图爬树时，很明显，河马没有翅膀来飞翔，也没有爪子来攀爬。

2·So he began to climb the tree.

因此他开始爬这棵树。

3·When did he climb the tree?

他什么时候爬树了？

4·Don't climb the tree because it's too high.

不要爬那棵树，因为它太高了。

5·He try to climb the tree, but he could not.

他尽力去爬树，可是爬不上去。

6·He learned to climb the tree hand under hand.

他学会两手交替使用爬树。

7·Finally, the hippo made up his mind that he would come out of the river, climb the tree and start singing.

最后，河马下定决心，他要从河里出来，爬上树开始唱歌。

8·Let's climb the tree by the river.

我们去爬河边那棵树吧。

9·I can climb the tree without a ladder.

我不用梯子就能上树。

10·He learned to climb the tree hand in hand.

他学会两手交替使用爬下树。