The difference between B2 and C1 is usually one word.
Snapped, cracked or shattered? Imply or infer? Start with the sentence below. Every answer comes back with the reason, in one line.
Item 1 of 12
The dry twig underfoot and every bird in the hedge took off.
Why this gets you moving quickly
Most practice sites test whether you know a rule. This one tests the choices that decide how you sound: the verb that says a twig broke rather than a mirror, the adjective that praises rather than insults, the reporting verb that quietly withholds agreement.
Progress is fast because the feedback is specific. You are never told simply that an answer was wrong. You are told what the word you picked would have meant, which is the part that sticks.
Start with a word family
Each page sets out the distinction in a sentence, then gives you the exercises immediately.
All word-choice pages · Confusable pairs · Grammar by level
Find your level first
Fifteen items, three minutes, no account. The test starts at mid-B1 and moves towards you after every answer, so it stops as soon as it is confident.