Look at the sentences below. Each has a mistake with an adverb or time xpression. Replace the wrong word/phrase with words from the box.
already, before, never, this week, yet 1. Martin has yet climbed Mont Blanc twice. 2. We've interviewed five people for this expedition so far last week. 3. We've ever been to the Himalayas 4. The students haven't passed the course already. 5. Mark and Susanna have been on a climbing expedition once yet.