Filling the Blank with the Suitable Option

The question asks us to choose the most suitable word to complete the sentence: "It’s never been seen in Britain before and ______ is always exciting."

We need a word that fits grammatically into the blank and makes logical sense in the context of the sentence. The phrase "______ is always exciting" indicates that the word in the blank functions as the subject of the verb "is". This means we are looking for a noun or a noun phrase.

Analyzing the Options:

• Rarely: This is an adverb. Adverbs modify verbs, adjectives, or other adverbs. They cannot function as the subject of a sentence. For example, you might say, "It is rarely seen," but not "Rarely is exciting."
• Rarer: This is the comparative form of the adjective "rare." Adjectives describe nouns. While an adjective can sometimes follow a linking verb (like "is") to describe the subject (e.g., "It is rare"), it cannot typically function as the subject itself in this structure. "Rarer is always exciting" is grammatically incorrect in this context.
• Rarity: This is a noun. It means the state or quality of being rare, or something that is rare. A noun can function as the subject of a sentence. "Rarity is always exciting" means the quality of being rare or the occurrence of something rare is always exciting. This fits the context of something never seen before being exciting.
• Rare: This is an adjective. Like "rarer," it describes nouns. It cannot function as the subject in this sentence structure. "Rare is always exciting" is grammatically incorrect here.

Based on the grammatical function required (subject of the verb "is") and the meaning, the noun Rarity is the only option that correctly completes the sentence.

The completed sentence is: "It’s never been seen in Britain before and Rarity is always exciting."

This sentence means that the fact that something is rare, or the rare thing itself, is always exciting.