中华人民共和国公民是指　(　　)​

根据短文理解, 从A、B、C、D四个选项中选择最佳答案填空。

    I have a brother. His name is Tom. Tom is a nice boy, 1he eats too much (太多) and he doesn't like sports.

In the morning he has three 2 and some bread. For lunch, he 3 two hamburgers and some chicken. He likes Coke (可乐), too. For dinner, he likes rice and salad. After that he 4 eats some ice-cream. Too much food 5 not good for Tom. Now he is not healthy.

    I want to help Tom to be 6. So I say, “Let's go to 7 tennis, Tom.”

 “Oh, it's 8,” Tom says.

 “What about volleyball?” I ask.

 “It's difficult,”9 says.

 “Well, I think you can play 10 well,” I say.

 “Sure, it's easy for me.”

    We have a good day playing ping-pong.

在盆栽植物的过程中，经常给盆景浇水，施肥、松土、放在阳光下，天气冷了，我们还要把花放在室内，而且一般一个花盆只栽一株植物，这体现了生物生存所需的基本条件，与上述顺序相对应，分别是：①阳光 ②空气 ③水分 ④营养物质 ⑤适宜的温度 ⑥一定的生存空间（  ）

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