Help the frustrated owner complete their online appliance review.
"My new smart fridge is completely broken; ___ convinced that ___ only purpose in life is to freeze my lettuce."
The correct answer is it's / its.
It's is a contraction of "it is" (The fridge is broken; it is convinced...).
Its is the possessive form of "it" (its only purpose).
Fun fact: Even native speakers constantly mix these up because we usually add an apostrophe + s to show possession (like "the dog's bone"). However, possessive pronouns (like his, hers, and its) never take an apostrophe!
Apostrophe
If you've ever stared at its and it's and not been sure which one belonged in your sentence, you've met the trickiest pair in English punctuation. Get this single mark right and your writing immediately looks more careful — get it wrong and even otherwise excellent prose looks sloppy.
The apostrophe ( ' ) does two main things in English: it marks missing letters in contractions (don't, they're, we'll) and shows possession with nouns (the eagle's feathers, one month's time). It does not make plurals: write cats, not cat's. The single most-mixed-up case is its (possessive) versus it's (= it is).
Possessive
If you've ever stared at its and it's and not been sure which one belonged in your sentence, you've met English's most-confused possessive. The fix is small but immediate: its (no apostrophe) is the possessive of it; it's (with apostrophe) always means it is or it has. Get this right and you instantly look more careful as a writer.
The possessive form shows ownership in English. Most nouns take 's (Sarah's book); plural nouns ending in s take just an apostrophe (students' essays). Pronouns have irregular possessive determiners (my, your, his, her) and pronouns (mine, yours, his, hers).
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).
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.