材料  世界上最不平静的半岛——朝鲜半岛，一直是这个世界上最易燃的地区之一。 一家日本媒体将朝鲜半岛比喻为“危险的大国竞技场”；而另一位专家说，大国权力政治的行使埋下了朝鲜问题的祸根，但同时也约束了这一祸根的恶化。在这个多方利益博弈的舞台上，剧终会是和平吗？

——《朝鲜半岛——高危之下60年》

    Tom and Mike had a very good time last Sunday.That morning，they1at six o'clock and dressed(穿衣)themselves.2having breakfast，they went to the park.It's in the centre of the city. In the park.there were a lot of nice flowers.Mike wanted to 3one，but Tom stopped(阻止)him.He told Mike it was not.4to pick flowers.Then they went to the lake.By the lake,they saw a small5.They jumped into it and started a tour on the lake.Two hours6,they left the lake and walked up the hill(小山)near the lake.They got to the top at half past eleven.There they had their lunch.7did they have for lunch?Eggs，bread and oranges.In the afternoon,they 8home.When their mother asked them about the morning，9answered，"It was great.We10ourselves(我们自己)all the morning."

20以内所有质数和是最小三位数的（   ）