![[单项选择题] The loading, unloading, transshipment and transit of inward and outward mail bags are subjec](http://www.mshxw.com/aiimages/29/75420.png "[单项选择题] The loading, unloading, transshipment and transit of inward and outward mail bags are subjec")
[单项选择题]Theloading,unloading,tr ansshipmentandtr ansitofinwardandoutwardmailbagsaresubjecttoCustomscontr olanda______wyabillshouldbesubmittedtotheCustomsbytheenterpriseprovidingprvidingpostalservice.
A．cover
B．covering
C．covered
D．haveingcovered
参考答案：
B问题解析:
解析无
