Level C1. Choose between past simple, past continuous, past perfect, and used to or would where the narrative context makes one choice uniquely natural.

Level C1. Topic: advanced contrasts between present perfect and present perfect continuous in realistic contexts. Exactly 12 questions. Exactly 2 questions have two correct options.

Level C2. 12 questions. Exactly 2 questions have two correct answers.

Level C1. 12 gap-fill multiple-choice items. Exactly two items have two correct answers.