How could you walk into the lab with your shoes?You’re________to take them off before you enter it.I told you so![ ]

下列各句中，没有语病的一项是（ ）

I think Hainan is one of ___________in China.

________ is no possibility ________ she can finish the task in two hours.　　

Have you seen the watch my uncle gave me as my birthday present last year —Sorry, I haven’t.