When is it appropriate to use 'that' as opposed to 'which'?
We've had an American Americanise some phrases for us (with the point of teaching children English), e.g:
UK English: There’s a little white dog which lives on the second floor.
US English: There’s a little white dog that lives on the second floor.
But there are three sentences which were not altered. We would rather not have a mixture of that and which to make things less confusing for the students. The sentences that were not changed were:
I really like this pencil case which Rose gave me.
There’s a store near here which is open all night.
This is a really cool picture which I brought with me from Little Bridge.
Should these be changed to that, or should we change the other sentences that have already been translated back to which?