Li Ling is the only one of the student in our class who have ever been to England. Last summer she is lucky to be sent there to study for three months. When she arrived in England by plane, she was picking up (接待)at the airport by the Johnson family, she would live with for the next few months.The family does everything they could to make Li Ling to feel at home. Li Ling began her study abroad at a middle school, where she met friends from all over world.

She made fully use of every minute to practise her spoken English and was highly thought of by all the people around him.

根据海关规定，进出口货物报关单的“贸易方式”栏填写未列名的贸易方式时，应填为“其他贸易”。在下列几种贸易方式中不可填写为“其他贸易”的有( )。

A．溢卸货物

B．货样

C．暂时进口货物

D．对台直接贸易