Lily has been to many Italian restaurants, but she still thinks that Macro Resaturant offers _____ delicious Italian food.
(A)the best
(B)more
(C)less
(D)the most

most 可分兩部分解釋:

1. 表數量"大部分"時,前面是不加冠詞的:

(V) Most of the students passed the exam.
(X) The most of the students passed the exam.
(X) A most of the students passed the exam.

2. 表示最高級時,若後面有接名詞的話一定要有定冠詞:

This is the most interesting story I've ever heard.

但是若只有形容詞或副詞的最高級時,則可加可不加:

Of all kinds of movies, I like horror movies (the) best.
The plan is (the) most important of all.

就你的問題來看,這句話的意思是表示數量: most early American inventions (大部分美國早期的發明),所以是不需要加冠詞的!

good -better-best

best是good的最高級