What two things can't you have for breakfast?How many sweets can you put into an empty bag?

有趣的英语脑筋急转弯：
1.What two things can't you have for breakfast?
答案是：Lunch and Supper（中餐和晚餐）
2.How many sweets can you put into an empty bag?
答案是：One sweet.
Because a second sweet can't be put into an empty pocket.（因为（口袋里已经放入一块糖）所以第二块糖不可能放入空的口袋了：