4 I've bought a little/several/much books to take on holiday.

Several is the correct answer. Explanation: "Books" is a countable noun. "A little" is used with uncountable nouns and would imply a small amount of something uncountable. "Much" is also usually used with uncountable nouns. "Several" means more than two but not many, so it best fits with countable plural nouns. Answer: several