阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

    Johnson is an eight-year-old boy. He is good boy. He does well in all his (lesson). He loves school, and he is always active (活跃的) in class. Every time the teacher asks a question. Johnson always (put) up his hand quickly. Sometimes his all answer is wrong, the teacher always smiles and says, “Good, Johnson. But is there a better answer my question? ”

    One day, the teacher asks the boys and girls a question. “Swallows (燕子) fly to the south before the winter is (come),” he says. “But don't cats and dogs do the same?”

    Johnson lifts his hand as (usually).

    “Yes, Johnson?” says me teacher (happy).

    Johnson stands up and says, “Because (them) have no wings (膀).”