Has it been warned that all the children in this area      stay at their homes until the Flu has been controlled ?

A．can

B．will

C．may

D．shall

报检员王某因工作需要脱离了报检岗位，其所属企业应收回其报检员证交当地检验检疫机构，并以()办理报检员证注销手续。

A．电话形式

B．电子邮件形式

C．传真形式

D．书面形式