Choose the correct word to complete the royal advisor's warning.
"The dragon is currently asleep and peaceful, but it will only remain _____ if you stop playing those dreadful bagpipes!"
The correct answer is so.
The word so can act as a substitute for an adjective or an adjective phrase functioning as a subject complement (in this case, "asleep and peaceful"). It frequently follows linking verbs like remain, seem, appear, and become.
Such is generally used to substitute for noun phrases, not adjective phrases, making "remain such" incorrect in this context.
Adjective
If you've ever written a French nice old wooden table and felt something was wrong without knowing why, you've hit the adjective-order rule. English insists on a particular sequence — opinion, size, age, shape, colour, origin, material — and rearranging the words makes a sentence sound non-native even when every individual choice is correct.
An adjective describes a noun or pronoun: a tall building, the soup is hot. Most adjectives also take comparative and superlative forms (taller, tallest), which is how you compare things — another core piece you need from day one.
Complement
If you've ever written Ryan is and felt the sentence had nowhere to go, you've felt the pull of a missing complement. Some verbs — be, seem, become, call, consider — flatly refuse to stand alone; they need a complement to point at, and leaving it out makes the sentence collapse mid-thought.
A complement is a word, phrase, or clause that completes the meaning of an expression. Subject complements describe the subject after linking verbs (She is a doctor); object complements describe the object after certain transitive verbs (We elected her chair).
Adverb
If you've ever written she sings beautiful when you meant beautifully, you've hit the most common adverb mistake. The fix sounds small, but it's the kind of detail that signals fluency at a glance — and once you see the pattern, you stop second-guessing it.
An adverb modifies a verb, an adjective, or another adverb, telling you how, when, where, how often, or to what degree: she sings beautifully, unbelievably fast, we go there often. Most form with -ly (quick → quickly), but a stubborn group don't change shape at all: fast, well, hard, late.
C1 | Advanced
If you've ever sat through a lecture in English, written a complaint letter, or argued a point in a meeting and come out feeling actually understood — not just tolerated — you've felt what C1 looks like. The level matters because it's where most universities, certifications, and skilled-work environments draw their language line.
C1 is the advanced level in the CEFR framework, demanding fluent and flexible language: inversion for emphasis, mixed and advanced conditionals, formal subjunctive, cleft sentences, and complex nominal phrases — all used appropriately across registers.
Difficulty: Hard
If easy and medium questions are clicking but you still feel exposed in real conversation or formal writing, you've outgrown the basics. Hard material is where the gaps you didn't know you had show up: the distractor that "sounds right", the rule that interacts with another rule, the case where context changes the answer. It's where genuine fluency is built.
The Hard difficulty tag marks upper-intermediate to advanced challenges — typically B2 and above. Interacting rules, edge cases, plausible distractors, and contexts that require genuine understanding rather than surface pattern-matching.