装载出口( )的集装箱，装载前须申请实施适载检验。

A．轻工产品

B．机电产品

C．矿产品

D．食品

In America, most people always ______ after a meal in a restaurant while some of us don't care

about others' service much.      [ ]

A. pay the bill and leave at once

B. help to clean the tables and wash the dishes 

C. give the persons who serve them some more money to show their thanks