赖世雄教你轻松说英语Unit 320 Im not SUre ifthis will work．我不确定这个是否可行。

Unit 320
I don't know if it is a good idea.
I'm not sure if this will work.
There is no harm in trying.
I'm not sure if this idea will work.
I'm not sure if this plan will work.

I think the proposal can work.
There's no harm in helping a person in need.