The correct answers are: "Crew, you must prepare yourselves for hyper-sleep," the captain announced. The ship's artificial intelligence finally taught itself how to tell knock-knock jokes. The engineers prided themselves on fixing the warp drive with nothing but duct tape.
...prepare yourselves... is correct. Because "Crew" refers to multiple people, the plural form "yourselves" is used instead of the singular "yourself."
...taught itself... is correct. The singular, non-human subject ("artificial intelligence") matches with "itself."
...prided themselves... is correct. The plural subject ("engineers") matches with "themselves."
Incorrect options:
"...disguised theirselves..." is incorrect. "Theirselves" is not a real word; the correct plural reflexive pronoun is themselves.
"...protect ourself..." is incorrect. "We" is plural, so the reflexive pronoun must also be plural: ourselves.
Pronoun
If you've ever paused before who vs whom, its vs it's, or me vs I — you've felt how much weight pronouns carry in English. They're tiny words but they're case-sensitive (I vs me), context-dependent, and one of the few places where everyday English still trips careful speakers. Get the common patterns right and you instantly sound more careful.
A pronoun is a closed class of small words that replace nouns or noun phrases. Types: personal (I, you, he…), demonstrative (this, that), relative (who, which), interrogative (who?, what?), reflexive (myself), and indefinite (everyone, nobody).
Morphology
If you've ever encountered a word like unmistakable or misinterpretation and worked out its meaning from the pieces (un- + mistake + -able; mis- + interpret + -ation) — you've used morphology. The system isn't unique to English, but English's mix of Germanic and Latin roots gives it more building blocks than most. Knowing the common ones triples your effective vocabulary.
Morphology is the study of how words are built from smaller parts: roots, stems, prefixes (un-, re-, pre-, mis-), and suffixes (-tion, -able, -ly, -ness). Recognising these pieces lets you decode unfamiliar words instead of memorising them whole.
English Grammar Basics
If grammar feels like a tangle of rules you can never quite remember, the fix isn't more advanced material — it's making the foundations automatic. The English Grammar Basics tag is where you do that: the building blocks every other topic stands on. Get these right and the rest stops feeling random.
It marks quizzes and explainers covering the core of English: nouns, verbs, adjectives, adverbs, prepositions, conjunctions, tenses, voice, mood, and basic sentence structure. Useful whether you're a beginner or refreshing rusty knowledge.
Humor
If you've ever reached the third drill of present perfect and felt your eyes glaze over, you've hit the limits of dry repetition. Practice that's even mildly funny is far easier to come back to — and far easier to remember weeks later. That's the whole point of the Humor tag.
The Humor tag marks questions where the author has tried to make the practice entertaining alongside instructive. Subjective, sometimes silly, but designed to keep you engaged long enough for the rule to stick.
B1 | Intermediate
If you can hold a conversation about your weekend, explain why you're late, and follow a short news story without panicking — but still feel lost in fast or technical English — you're probably operating at B1. Knowing this matters: study material at the wrong level either bores you or burns you out, and B1 is the typical target for travel, casual work, and most everyday social English.
B1 is the intermediate level in the CEFR framework, where you handle everyday English independently and start combining ideas with complex sentences, passive voice, and modal verbs.
Difficulty: Medium
If easy questions feel too obvious but hard questions leave you guessing, you're probably ready for Medium — the level where most real learning happens. It pushes just enough to expose the rules you don't quite have yet, without burying you in edge cases. This is where steady fluency is built, one well-aimed challenge at a time.
The Medium difficulty tag marks middle-range challenges — typically A2 to B1. One rule per question, realistic distractors, and contexts that require active thought rather than instant recognition.