How to pronounce 'one'?

English Language Tests, Intermediate level

ESL/EFL Test #234 [color=blue]“Phrasal Verbs used with Criminal Activity”, question 7

After a one-hour high-speed chase, the police finally the criminal.

(a) put over
(b) pulled over
(c) beat over
(d) kept up

English Language Tests, Intermediate level

ESL/EFL Test #234 [color=blue]“Phrasal Verbs used with Criminal Activity”, answer 7

After a one-hour high-speed chase, the police finally pulled over the criminal.

Correct answer: (b) pulled over

Your answer was: [color=green]correct
[size=200]_________________________[/size]

Hi,
I wonder shouldn’t we use “an” one-hour high -speed chase instead of “a” in this case?

.
‘One’ is pronounced with an initial consonant sound, /w/.
.

pulled over = caught ? or stopped the criminal on the pavement?
thanks

It means that the police made the driver stop by the side of the road.[YSaerTTEW443543]

TOEIC listening, question-response: When did the cargo ship leave Singapore?[YSaerTTEW443543]