10. What bird lifts heavy things? (什么鸟能举起重物？)
11. A ship can contain only fifty persons. Now there is alreadyforty-nine person in it. At this time,a pregnant woman comes on andboards the ship. The shipsinks. 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？)

脑筋急转弯大全及答案：10. Crane. (鹤。Crane鹤，举重机)
11. Because is a pigboat. (那是潜水艇。pigboat，潜水艇)