which adverb best completes the sentence? after he got his new glasses, tom saw things ______ than he did…

Answer:

B. more clearly

Brief Explanations:

• "clearly" is an adverb. The comparative form of adverbs ending in -ly is formed by adding "more".
• "clearlier" is incorrect as "clearly" is an adverb and not an adjective (so the -er form for adjectives doesn't apply).
• "least clearly" is a superlative form (used for comparison among three or more things), but the sentence has a comparison between two states (before and after getting glasses).
• "clearliest" is an incorrect form (the superlative of "clearly" is "most clearly").
• The sentence has a comparison (indicated by "than") between Tom's vision before and after getting glasses. So, the comparative form "more clearly" is the correct choice.