_______ the smoke come out of the building, my first thought was to call the fire department as soon as possible. 

I dislike _____ when others laugh at me in public or speak ill of me behind.

– Is everybody here?– Not yet… Look, there ____ the rest of our visitors!

The Great Wall is _______ tourist attraction that millions of people pour in every year.

This is the first time I ______ such beautiful music .