Heisanolddoctorwithalotof

问题详情：

He is an old doctor with a lot of ________. But he has never travelled by air before. Taking a plane was quite ________ experience for him this time.

A. experience; an         B. experiences; an      C. experience; /        D. experiences; /

【回答】

A

知识点：名词

题型：选择题