— When did Prince William and Kate get married?— They ______ for about two years. 

There _______ less air pollution in the country .

--- What did your daughter say in her letter? --- She told me that she ________ Cambridge University already with her friends. 

I’m in No.5 Middle School, but my brother ______.

--- ____ you ever_____ the new Minyuan Stadium?  --- No, I haven’t.