“核糖”不可能是下列哪一种结构或物质的组成成分

①北极地区是陆地

②南极地区是陆地

③北极地区被三大洋包围

④南极地区被三大洋包围

    Last week our school held a sports meeting. Everyone in our class felt very 1 because we 2 many matches. In the boys' relay race, Michael3 very fast and our class won the first place. Alice did well 4 the long jump and she also won. We're sorry that we did 5 in the high jump than other classes, but we're sure we could do better next time. I took part in the boys' 6 race. I did my best and was the first 7 the finish line. This encouraged 8 a lot. Now I love sports better and I think nothing makes me9 than taking exercise everyday and I believe some day I 10 able to be the best soccer player and take part in the Olympic Games.