83%

Agent 008 is reviewing her top-secret mission brief. The agency's translator often confuses "to" and "for" (a common trap for speakers of languages that use por and para).

Select ALL the sentences that correctly use "to" and "for".

You must travel to Berlin for a highly classified meeting.

I bought this exploding pen to you.

She used a fake mustache to disguise herself.

Use this laser watch for unlock the safe.

This mission is too dangerous for a beginner.

The correct answers are: You must travel to Berlin for a highly classified meeting. She used a fake mustache to disguise herself. This mission is too dangerous for a beginner.

Use to + verb to show purpose (to disguise herself, to unlock the safe). Never use for + base verb.

Use for + noun to show the purpose of an object or action (for a meeting).

When giving or buying something for someone's benefit, we use for (bought this pen for you), not to.

Medium B2 | Upper Intermediate Preposition

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Preposition

Preposition vs particle: same words (in, on, up, off), different jobs. A preposition links to a noun (look at the book). A particle changes verb meaning without a noun (give up = quit). Test: is there a noun/pronoun after it forming a prepositional phrase? → preposition. Does it change the verb's meaning? → particle in a phrasal verb.

A preposition = small word connecting a noun to the sentence (time, place, manner, relationship). Choice is idiomatic per verb/adjective combination.

Diagnostic: struggling with which preposition to use? It's almost never about logic — look up the specific verb/adjective + preposition combination.

B2 | Upper Intermediate

B2 vs C1: B2 means effective communication on complex topics with some effort. C1 means effortless fluency with precise register control. If you can argue a point but still reach for words and make structural slips under pressure, you're B2.

B2 is the upper-intermediate CEFR level: mixed conditionals, complex passives, reported speech with backshift, participle clauses, and sustained written argument.

Diagnostic: does your writing read as "competent non-native" or "could be native"? The former → B2. The latter → C1.

Medium

Medium vs Easy: Easy has one obviously correct answer and clearly wrong distractors. Medium has one correct answer but plausible distractors — you need to actually know the rule, not just guess from sound.

The Medium tag filters for A2–B1 challenges with realistic difficulty: one rule per question, plausible alternatives, everyday contexts.

Diagnostic: if you're scoring 90%+ on Easy, move here. If you're below 60% on Medium, go back to Easy for that topic. Target 70–80% accuracy for maximum learning.