超不明白 imagine的用法,望帮解答这题 谢谢

题目

超不明白 imagine的用法,望帮解答这题 谢谢
Some people imagine flying_____more dangerous than travelling by train. Which is wrong.
A.to be B. D.being
答案是D 注解说AB 是复合宾语,
但我不理解D项不能看做是imagine sth /sb doing 的结构吗? flying 就是sth ,being 就是doing
我就是问 D怎么是错的？

答案

答案应该是A吧imagine sth to be=imagine sth as
Some people imagine flying to be more dangerous than travelling by train.Which is wrong.
to be more dangerous than travelling by train.用来说明flying（也就是宾补）说以说是复合宾语.
这是新概念3册内容
eg.we sometimes imagine a desert island to be a sort of paradise where the sun always shines.
我们有时想象荒岛是阳光终日普照的天堂.
to be a sort of paradise where the sun always shines就是用来说明宾语a desert island的情况,也就是宾语补语