the companies are working together to create---- they hope will be the best means of transport in the 21st century
问题描述：
the companies are working together to create---- they hope will be the best means of transport in the 21st century
为什么要填what
答
what引导的宾语从句,并在从句中作主语,你去掉what看看后面句子是不是少了什么