As the quality of the city’s air continues to give rise to ______, the residents are encouraged to set off fewer fireworks. 

In my opinion, what he told us just now about the affair simply doesn’t make any ________.

—Where did you spend last weekend?—At______.

Lucy is a girl of great musical _________, and I’m sure she will become a well-known musician sooner or later.

His_______ was so strong that I couldn’t understand a word he was saying.