這兩種表達方式都對
基本上沒有實質(zhì)上的差別.
短語 a lot of work to do
可以理解為
a lot of work (for us/him/her ...) to do
的變體.
其他表達方式有
there is a lot of work ahead of us
much is left to do
much is left to be done
much is yet to be done
there is much to be completed
much work remains ahead
we ain't done yet; not by any stretch of imagination（口語）
等等,等等.
我是加拿大人,前英語老師.