Why is "clock didn't go off"?

Olena · Wed Mar 28, 2007 0:06 am *Why is "clock didn't go off"?*

English Language Tests, Intermediate level

ESL/EFL Test #164 "Idioms with the phrasal verb go", question 4

Rosie overslept because her alarm clock didn't ......... this morning.

(a) go off
(b) go over
(c) go on
(d) go back

English Language Tests, Intermediate level

ESL/EFL Test #164 "Idioms with the phrasal verb go", answer 4

Rosie overslept because her alarm clock didn't go off this morning.

Correct answer: (a) go off

Your answer was: incorrect
Rosie overslept because her alarm clock didn't go on this morning.
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Why is "go off"?

Olena

Conchita · Wed Mar 28, 2007 0:30 am *Why is "clock didn't go off"?*

go off

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