Due to the widespread ________ of this medical technology，more diseases can be discovered and treated at an early stage.

I do hope that you can give me some good _______ on how to improve my spoken English. 

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

Much to my _______,I am unable to accept your invitation.

The head office of the computer company is in Zhejiang, but it has ______ all over the country.