Words that are close in meaning are calledA．homonyms.B．polysemy.C．hyponyms.D．synonyms.

Air pollution People and air pollution are often in the same places. This means that cities with large populations have the biggest problem of dirty air. Air pollution is caused by many different thi

The words with similar meaning used in different regional dialects are calledA．dialectal s

The phenomenon that words of different meanings are identical in sound is calledA．hyponymy

Employees in the US are paid for their time. This means that they are supposed toA．work ha

The meaning of a sentence is always the sum total of the words in that sentence.（)

When the author refers to professions as no longer being closed guilds he means that___