When to use 'off'?

[ab]

English Grammar Tests, Elementary Level

ESL/EFL Test #84 "ESL Prepositions", question 1

The board meeting was called ......... due to the sudden demise of the chief executive office.

(a) for
(b) off
(c) to
(d) out

English Grammar Tests, Elementary Level

ESL/EFL Test #84 "ESL Prepositions", answer 1

The board meeting was called off due to the sudden demise of the chief executive office.

Correct answer: (b) off

Your answer was: incorrect
The board meeting was called out due to the sudden demise of the chief executive office.
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Hi,

please explain to me when to use "off"?
thanks

ab

[Mister Micawber]

.
All of the prepositions in the answers to this test question have many uses, and all of them appear in idiomatic phrasal verbs like call off, which means cancel (an event).
.
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Native English teacher at Mister Micawber's