The correct answers are Elephants are highly intelligent creatures that form deep family bonds. and The elephants at the local rescue center are very playful today.
When speaking about plural countable nouns in a general sense, we use the zero article (e.g., Elephants are intelligent).
We only use "the" with plural nouns when referring to a specific group (e.g., The elephants at the local rescue center). Saying "The elephants... in general" is contradictory and incorrect. Finally, "an" can never be used with plural nouns!
Article
Articles are a small group of determinatives that signal whether a noun refers to something specific (the book) or something general (a book). English has three: the definite article the, the indefinite articles a/an, and the zero article — the meaningful absence of any article (Coffee keeps me awake).
Articles are one of the trickiest parts of English for non-native speakers because the choice depends on context, not just the noun itself. Get them right and your writing instantly sounds more natural; miss them and even simple sentences feel "off" to a native ear.
Grammatical number
Grammatical number is the singular vs plural distinction marked on nouns, pronouns, and verbs. Most English nouns add -s or -es to form plurals (book → books, box → boxes), but a handful keep older patterns: child → children, foot → feet, mouse → mice, sheep → sheep. Pronouns swap forms entirely (I → we, he → they).
Number governs subject-verb agreement: He goes but They go. Mismatching subject and verb (The team are/is winning) is one of the most common slips in writing — and one that catches the attention of any careful reader.
English Grammar Basics
The English Grammar Basics tag marks quizzes and explainers covering the foundations of English grammar — nouns, verbs, adjectives, adverbs, prepositions, conjunctions, tenses, voice, mood, and basic sentence structure.
If you're starting out or rebuilding from scratch, this is the tag to follow: every challenge under it is designed to land the core rules without burying you in exceptions. Get the basics solid here and the more advanced topics — conditionals, reported speech, inversion — stop looking like a wall of new rules and start looking like extensions of what you already know.
B2 | Upper Intermediate
B2 is the upper-intermediate level in the CEFR framework, sitting between B1 and C1. At B2 you can read editorials, follow most TED talks without subtitles, and hold extended conversations on abstract topics — including topics outside your everyday life.
Grammatically, B2 means flexible control of mixed conditionals, passive voice across tenses, reported speech with proper backshifting, and participle clauses. B2 is the standard target for university entrance exams (IELTS 5.5–6.5, TOEFL 87–109) and most skilled-migration thresholds — knowing whether you're there shapes your study plan.
Difficulty: Medium
The Medium difficulty tag marks questions and challenges in the middle of the difficulty range — typically suitable for A2 to B1 learners. Expect a single rule with realistic distractors, longer sentences, and contexts where you have to think before answering rather than reading off the obvious choice.
Filter by Medium when you're past the absolute basics and ready to consolidate. It's the level where most lasting progress happens — easy enough that you can finish without exhausting concentration, hard enough that getting it right means you've actually understood.