Question

complete the sentence with the word that best fits the overall meaning and tone. the mayor had been a ______ of the newberg government for decades, so he was missed when he returned to his law practice. mainstay proponent

Explanation:

To solve this, we analyze the meanings: "mainstay" means a person or thing that is a chief support, fitting the context of the mayor being a long - term key part of the government (so missed when he left). "proponent" means someone who supports an idea, which doesn't fit as well here.

Answer:

mainstay