Interested in Language
I often read things like:
"It's 7 dollars."
"It's the movies which make them thinking this way" - well, not sure about the sentence, but the 1st part is more important than the rest either way.
I guess this can be right because the "is" belongs to the "it", not to the word that comes after.
In German (if you would translate every single word) it would be:
It are 7 dollars
It are the movies.
This is because the it/are belongs to the object.
So, maybe it's not the same in English...