Now I'm at the ______.I'd like to buy a dress for my daughter.

-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. 

 - Is there any ＿＿＿＿＿＿ for two chairs in the office?- Yes, I think so.

— Will Mr Shu give us a talk about the survey next week?— Yes, and he will give us ______ about it. 

 His favourite _____ is science.