difference between employment and duty

[Xiwi]

Synonyms Lesson, Advanced Level

ESL/EFL Test #122 "Synonyms for business and employment", question 6

We are proud that all our students graduated and found ......... in good companies and at good wages.

(a) employment
(b) commerce
(c) calling
(d) duty

Synonyms Lesson, Advanced Level

ESL/EFL Test #122 "Synonyms for business and employment", answer 6

We are proud that all our students graduated and found employment in good companies and at good wages.

Correct answer: (a) employment
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difference between employment & duty?

Xiwi

[Mister Micawber]

.
'Duty' in such a case as this quiz question would refer to a responsibility within one's employment.
.
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Native English teacher at Mister Micawber's