"I don't know, " said the kangaroo. "Maybe a thousand feet if they keep leaving the gate unlocked.

Notes:

　　(1) enclosure n.围墙

　　(2) kangaroo n.袋鼠

　　(3) exasperated adj.恼火的

Exercises:

根据短文回答下列问题：

　　① What had the zoo newly squired?

　　② Why did the zoo keep increasing the height of the fence?

　　③ How did the zoo director feel about it?

　　④ Why could the animal still escape even when the fence was increased to a height of 30 feet?

　　⑤ What does the passage imply?

袋鼠的能力

　　动物园为刚引进的袋鼠建了一个特殊的八英尺高的围墙。但是第二天早上，人们发现这动物在围墙外面蹦跳着。于是围墙高度增加到十五英尺，但袋鼠还是跑了出来。动物园经理甚感恼火，又叫人把围墙高度加到三十英尺，但袋鼠还是逃了出来。一个长颈鹿问袋鼠：“你认为他们会把围墙建到多高？”

　　“我不知道，”袋鼠说，“如果他们继续开着大门，可能要修到一千英尺吧。”

练习参考答案：

　　① The zoo had newly acquired a kangaroo.

　　② Because the kangaroo kept getting out of the fence.

　　③ The director felt exasperated.

　　④ Because the door of the fence was not locked.

　　⑤ The passage implies that the zoo was in bad management.