公共航空运输企业应当以（ ）为准则,采取有效措施,提高运输服务质量

　Please release the ___ . They are innocent.

　Please ___ the hostages. They are innocent.

　There is no benefit for you to endanger ___ .

　There is no benefit for you to endanger ___ .

　Please calm down, don’t hurt the ___

　Please ___ , don’t hurt the innocent passengers.

　___ , speak clearly.

　We are considering about your ___ .

　We are ___about your request.

　I have confirmed that the hijacker doesn’t have any ___ .