Can I use "it" instead of "them" to mean a whole unit for plural nouns in spoken language?
A: These flowers are so pretty.
B: Let me put it in a vase.
A: Here are 20 sets of document I photocopied.
B: Thanks. I will bring it to the meeting room.
A: I bought a lot of vegetables from the market.
B: I'm going to chop it all.
So, are they interchangeable?