口语运用 根据对话内容填入适当的句子，使对话完整正确。（每小题2分满分10分）

Jane:   Hi,Michael.Would you like to be a greener person?

Michael: 小题1:    But what should I do?

Jane:   First,you ought to turn off the lights when you leave a room.

Michael:  小题2:    What’s next?

Jane:   Second,you’d better walk or ride a bike instead of taking a bus or a taxi if you travel a short distance.

Michael:  小题3:   It will save energy and reduce air pollution.

Jane:   Third,take a cloth bag when you go shopping. 小题4: 

Michael:It’s so easy to be a greener peson.

Jane:     小题5:   

Michael:Well,actions speak louder than words.

某购房人从银行贷款50万元，贷款期限10年，按月等额还本付息，贷款年利率为 6%，每月计息一次，其每月应向银行还款的数额为( )元。

A．4 917

B．5 551

C．7468

D．7 581