算式（﹣7）+（+1）﹣（﹣3）﹣（+5）写成省略括号的和的形式，正确的是（　　）

下列关于细胞化合物的叙述，正确的是（  ）

①质粒、核糖核苷酸、ATP共有的组成元素是C，H，O，N，P；

②内环境中发生的丙酮酸氧化分解产生ATP的过程，属于放能反应；

③溶酶体含有多种水解酶，可以分解衰老的细胞器，并为细胞生命活动提供原料；

④T细胞释放的淋巴因子能使受到抗原刺激的B细胞增殖；

⑤叶肉细胞内的H都在光反应阶段产生，用于暗反应C₃的还原；

⑥ATP，酶、激素和神经递质等都是细胞中产生的有机物，作用后都立即被分解．

    My friend Tony is an American 1. He is ten years old. He lives2 his family in China now. There are 3  people in his family; his mother Mrs. Green, his father Mr. Green and his little sister Amy. He has a white cat. 4 name is Betty. Look！Amy is playing 5Betty. His father, Mr. Green, is watc­hing TV. His mother is doing housework. What about Tony? He is doing 6 Chinese homework. He can't 7Chinese well, but he likes Chinese very much. Tony's 8 works in a TV station. His father works in a school as an 9 teacher. Tony and his sister 10 to the same school.