连词成句

morning, my, didn't, clock, off, alarm, this, go

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This morning my alarm clock didn't ________, so I was late for school.

1. A.
   go off
2. B.
   run off
3. C.
   set off
4. D.
   put off

This morning my alarm clock didn't ________, so I was late for school.

[　　]

This morning my alarm clock didn't ________, so I was late for school.

[　　]

This morning my alarm clock didn't ________, so I was late for school.

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