同学你好，该知识点来自沪江网校《新概念英语2、3、4册连读【双11专享班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
Though the writer had nothing to declare, the Customs Officer
made him unlock his case. Searching the case carefully, the Officer
found a small bottle, which he thought was perfume. The writer told
the Customs Officer that it was hair gel, which he had made
himself. As the Officer did not believe this, the
writer encouraged him to try it. The unpleasant smell
convinced him the writer was telling the truth, so he let him
pass through Customs.

祝同学学习进步~