11. What always goes up and never goes down? (什么东西只升不降?)
Key：Your age. (你的年龄)
12.Why did the boy make his dog sit in the sun?(男孩为什么让他的狗坐在阳光下?)
Key：He wants to have a hot dog. (他想要一条热狗。)
13.Why can a bride hide nothing?(为什么新娘子什么也藏不住?)
Key：Because someone will give her away. (因为有人会揭发她。Give away揭发，在婚礼上把新娘交给新郎)
14.Why is the library thehighest building?(为什么图书馆是最高的建筑物?)
Key： It has the most stories. (它的楼层最多。Story 故事，楼层)
15.What is the smallest bridge in the world? (世界上最小的桥梁是什么?)
Key：The bridge of a nose. (鼻梁)
16.What is the difference between the North Poleand the South Pole? (北极与南极的区别是什么?)
Key：A whole world. (整个世界。 a world of difference 天壤之别)
17.What makes naughty boys long to work in aclock factory? (淘气的男孩为什么想去钟表厂工作?)
Key：They want to make faces. (make face 做鬼脸，做钟表面)
18.What bird lifts heavy things? (什么鸟能举起重物?)
Key：Crane. (鹤。Crane鹤，举重机)
19.A ship can contain onlyfifty persons. Now there is already forty-nine person in it. At this time, apregnant woman comes on and boards the ship. The ship sinks. Why? (有一艘船只能容纳50人，现在已有49人。这时一位孕妇上了船，船就沉了。为什么?)
Key：Because is a pigboat. (那是潜水艇。pigboat，潜水艇)
20.What's the poorest bank in the world? (世界的最贫穷的银行是什么?)
Key：The river bank。(河岸, bank有“岸”和“银行”两个意思)