-You look so worried, what’s wrong?  -More and more people like me begin to worry about the ______ pollution after the haze (雾霾) appeared in Beijing and some other cities in China. 

Those are my______ clothes

— Shall we go out for a walk?— Sorry. This is not the right _______ to invite me. I am too tired to walk.

Where’re Pandas from?      --Pandas are from ______.

Tomorrow is ________, so I want to give a present to Miss Li.