using 'in' or 'for' in this case to replace 'since'?

[huong]

English Error, Elementary Level

ESL/EFL Test #23 "The bank raid", question 5

They didn't talk about the plan since a whole week and they still had no money and also no chance of getting any.

(a) since
(b) still
(c) any

English Error, Elementary Level

ESL/EFL Test #23 "The bank raid", answer 5

They didn't talk about the plan for a whole week and they still had no money and also no chance of getting any.

Correct entry: for
The error was: (a) since
_________________________

using " in" or " for" in this case to replace " since"?

huong

[Alan]

Hi,

'For' is used to cover the whole length of the week.

Alan
_________________
English as a Second Language
You can read my ESL story The way you write it

[Colonelcy]

what about "during"? instead of "for"
they point out that "during" is for past time and "for" is for present one.