Fill in the blank with the correct option: He spoke so ___ that the audience was mesmerized.
- (a)fluently
- (b)fluent
- (c)fluented
- (d)fluency
Answer
Why
Correct — A. The blank describes how he spoke, so it modifies the verb spoke. A word that modifies a verb is an adverb.
In so ___ that, so is a degree word and needs an adjective or an adverb after it. With an action verb it must be the adverb: spoke so fluently that.
Fluently is the adverb → option (a).
Why the others are wrong
- (b)fluent — Fluent is an adjective. It needs a noun or a linking verb: a fluent speaker, he was so fluent. It cannot describe how someone spoke.
- (c)fluented — Fluented is not a word. Fluent is an adjective, not a verb, so it has no -ed form.
- (d)fluency — Fluency is a noun, and a bare noun cannot follow the degree word 'so'. With a noun you need such: he spoke with such fluency that the audience was mesmerized.
Concept
Adjective or adverb is decided by what the word describes. Adjectives describe nouns: a fluent speaker. Adverbs describe verbs, adjectives and other adverbs: she speaks fluently.
Linking verbs such as be, seem and become take an adjective: he was fluent. Action verbs take an adverb: he spoke fluently.
The so ... that frame shows a result: so plus an adjective or adverb, then a that-clause saying what followed. Its noun partner is such ... that.
The blank has to fit two things at once, the degree word so and the action verb spoke. Fluently is the form that satisfies both.
Key facts
- An adverb, not an adjective, modifies an action verb: he spoke fluently.
- Linking verbs such as be and seem take an adjective: he was fluent.
- So is followed by an adjective or adverb, such by a noun phrase: so fluently, such fluency.
- Fluent has no verb form, so fluented is not a word.
Study next
Common traps
- Choosing fluent because so fluent sounds natural, without checking that the verb is spoke
- Choosing fluency because with such fluency is correct, forgetting the blank follows so, not such
A one-sentence blank with four forms of one word is a word-class test: work out what the blank modifies, then pick the matching form.
The same adverb-after-verb rule is also tested at 15 Sep 2025, 16:00, English Q.21, a sentence-improvement item on He speaks English good, keyed well.
Related PYQs
No directly related past PYQ was found.