White-collar work is performed in an office or administrative settting. They are characterized as non-manual workers. A few examples are lawyers, doctors, accountants and engineers.
I believe the answer is feels
The beginning is the central idea of everything written after it.
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An adverb can refer to objects of time. They are usually prepositions also.
1. Often
2. Very Fast
I: noun
run: verb
fast: adjective