English,
step by step.
Every task from the three official workbooks, practice by section, exam-format tests with a timer, and an explanation for every answer.
The portion of a mountain __________ trees cannot grow is called the tree line.
The portion of a mountain where trees cannot grow is called the tree line.
where begins a clause about a place and replaces “in which”; the clause already has its own subject (“trees”).
Practise by book
Start with any partBook 1
13 sections · 980 items
Book 2
13 sections · 955 items
Book 3
13 sections · 914 items
A new exam-format test whenever you want
Generate a test that follows the 2025 English exam template — 13 parts, 80 tasks, 180 minutes — with the parts in the exam order and tasks picked at random from the books you choose.
- The official exam template, or your own number of tasks for each part
- All tasks on one page with a countdown timer
- Your score by part, the time you spent and an explanation for every answer
How it works
Three steps to the examPractise by section
Work through the 13 task types of each book one task at a time, with a short guide on how to solve each type.
Take an exam-format test
Generate a test that follows the 2025 exam template — same parts, same order — with a timer and a task grid.
Learn from every answer
See the completed sentence, why the answer is right, what was wrong with yours and the grammar rule behind it.
What helps you in English
Explanations for every answer
The completed sentence, the signal words, the form you chose and the rule — not just “wrong”.
The 2025 exam template
Default tests match the real exam: 13 parts, 80 tasks, in the exam order.
Guides for each task type
What each part tests, step-by-step strategy, common traps and a worked example.