Vấn đề 3đáp ngắn3. They _______ (already/start) eating when we got to the restaurant.had already started
Vấn đề 5đáp ngắn5. The movie _______ (already/begin) by the time we entered the cinema.had already begun
Vấn đề 7đáp ngắn7. We were late because we _______ (forget) the directions to the venue.had forgotten