Don't worry too much about making _____ mistakes. They are _____ natural part of learning. [ ]

A. /: a

B. the;/

C. /; the

D. the; the

货物通关后入境货物的（）需在检验检疫机构规定的时间和地点到指定的检验检疫机构联系对货物实行检验检疫。

A．发货人

B．发货人或其代理人

C．发货人和货主

D．货主或其代理人