Answer: "I love cheese!" is the simple sentence.
Explanation: A simple sentence is a sentence made up of a single clause, that is to say a sentence that only contains one subject and one predicate. The sentence "I love cheese!" is simple since it only consists of one clause. The only subject is "I" and the only predicate is "love cheese!". In contrast, the sentences "When you go to the store, do you go alone?" and "I drive a truck because I dislike cars" are complex, and "I would hate to travel without a phone; I would feel lost without one" is a compound sentence.