读—读，填上适当的句子完成对话，每句限用—次
A. I ride my bicycle. B. I live near the school. C. Me too. D. About twenty minutes. E. I walk to school. F. I come to school by bus. |
Mr. Wang: How do you come to school, Alice?
Alice: I come to school on foot. ____
Mr. Wang: Do you come to school on foot, Jack?
Jack: No, I don't. ____
Mr. Wang: How long do you stay on the bus?
Jack: ____
Danny: Oh, you're tired. ____
Peter: ____
Danny: Let's ride together tomorrow.
Peter: OK.
N2+CO2+2H2O，则框内物质的化学式是（ ）
