What does "on the point of" mean?

[huong]

English Error, Elementary Level

ESL/EFL Test #21 "Thank you letter", question 5

In the end I rushed downstairs just before the postman was on the point to going and opened the door.

(a) In
(b) downstairs
(c) to

English Error, Elementary Level

ESL/EFL Test #21 "Thank you letter", answer 5

In the end I rushed downstairs just before the postman was on the point of going and opened the door.

Correct entry: of
The error was: (c) to
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What does "on the point of" mean?

huong

[Alan]

Hi,

'On the point of' has the same sense as 'about to' as in:

I was on the point of phoning you (about to phone you) when you knocked on my front door.

Alan
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English as a Second Language
You can read my ESL story Prepositions

[Lost_Soul]

Hi, Alan

In other words, on the point of means exactly the same as on the verge of/on the brink of in this sentence, right?

Thank you in advance.

[Alan]

Right!

A
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English as a Foreign Language
You can read my EFL story Relative Pronoun