根据所给情景，用所给单词或短语补全对话。

A. Sometimes  B. on foot  C. by bus  D. far  E. can't  F. by taxi  G. Usually

Sarah: How do you go to school?

John: , I go to school .

Sarah: Can you go there .

John: No, I . It's too . I go to school, but It's too expensive（昂贵的）.