下列关于水稻的结构层次从微观到宏观的排列顺序，正确的是（  ）

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   Tom is thirteen years old．He is in Grade Seven this year．He likes playing football and watching football matches．And he often reads newspapers．He does his best to know when and where there is going to be a football match．Now Tom is having

lunch and he is also reading newspapers．He is very happy because there is going to be a nice football match on TV at four this afternoon．He wants to watch it very much，but he is going to have English and maths lessons h the afternoon．He thinks hard and finds a way．

    “Hello，Mrs. Black，”Tom says to his teacher on the telephone．“Tom is ill in bed．H e wants to ask for half a day's leave(请半天假)．”

    “Oh，I'm sorry to hear that，”says Mrs. Black．“But who is that?”

    “It's my father，Mrs. Black，”Tom answers．