“平沙莽莽黄入天，英雄埋名五十年。”感动中国人物林俊德入伍52年，参加了我国全部核试验任务，先后获得30多项科技成果。在癌症晚期，他仍以超常的意志工作到生命最后一刻。林俊德的事迹告诉我们（）

$\frac{4}{5}-x=\frac{2}{7}$

$x=$ ____

    Miss White see some school things ____the teacher's desk. They are a pencil box, a red pencil, two black ____(pen), a blue watch and an ____ notebook. Whose are they?

    Miss White asks Tina, “Tina, is this ____pencil box?”Tina says, “Yes, it is. Thank you.” “Are____(this) your pens?” asks Miss White. “No, they ____.They're____(Lucy).” says Tina.

Miss White goes to Lucy and says, “ Are they your pens, Lucy?” Lucy says, “Yes, they are. Thank you.” “What____ the red pencil? Is it ____(you), too?” Miss White asks. “ No, it isn't.” says Lucy. “And the watch and the aren't mine, either(也).” “Oh, I can put them____the lost and found box.” says Miss White.

读课文《快乐的节日》回答。

小声读第三小节，看看有几句话？每句所表达的是什么样的感情？