our factory is much more productive now.this year's production is five times _____it was ten years ago.为什么用what(闲人勿扰)

问题描述:

our factory is much more productive now.this year's production is five times _____it was ten years ago.为什么用what
(闲人勿扰)

What代前面的production.

what在这做it was的宾语!ok!