- have foot in the door （ idioms )
- to make the first step toward a goal by gaining entry into an organization, a career, etc. He took a job as a secretary to get his foot in the door.
- frequently > often > usually (1 / week).
- I don't know if i have a cold
- coherence = understanding.
- stand on the same topic
- "synonyms" is the difference word in the same meaning.
- standardized = cause (something) to conform to a standard.
- "we could standardize on U.S. equipment".
- "the editors failed to standardize the spelling of geographic names"
- proficiency = ranking = level
- authorities people or organization in charge of / to take charge of ...
