We are going on a week long holiday. OR
We are going for a week long holiday.
Both are OK. We go for or on a holiday. I prefer for here, because we say for a week and this puts emphasis on the time.
or would you use something else for ON or FOR? No
Move the books __________ the second shelf. (to, on, onto or anything else)
To � moving position or onto Moving to a position on something. Both OK.
The meaning changes with on or from: Move the books on the second shelf to the top shelf.
Move the books from the second shelf to the top shelf.
The show lasted ___________ eight o �clock ___________ ten thirty.
The show lasted from eight o �clock to/till until ten thirty.
I would use till or until for a measure of passing time. but From place to place.
Gyan is allowed to watch television ___ an hour __ dinner.
Gyan is allowed to watch television for an hour at or during dinner.
Gyan is allowed to watch television for an hour at dinner time.
Some animals hunt _________ (during/at) the night.
Some animals hunt at night.
or
Some animals hunt during the night.
