Fill in for or since. 1. We've been working in the garden _______ we had lunch. 2. Sally has been staying with her cousin _______ she arrived. 3. Our friends have been travelling _______ three months. 4. He's been learning Chinese _______ he was seven years old. 5. Have they been fishing _______ four hours? 6. Has Mary been cleaning the flat _______ two o'clock? 7. Peter has been driving a car _______ twenty years. 8. He's been doing karate _______ he was ten years old. 9. What have you been doing _______ last month?

1. We've been working in the garden since we had lunch. 2. Sally has been staying with her cousin since she arrived. 3. Our friends have been travelling for three months. 4. He's been learning Chinese since he was seven years old. 5. Have they been fishing for four hours? 6. Has Mary been cleaning the flat since two o'clock? 7. Peter has been driving a car for twenty years. 8. He's been doing karate since he was ten years old. 9. What have you been doing since last month? Объяснение: * Since используется, когда речь идет о конкретном моменте времени в прошлом (например, "since we had lunch", "since she arrived", "since two o'clock"). Это указывает на начало периода времени, который продолжается до настоящего момента. * For используется, когда речь идет о продолжительности времени (например, "for three months", "for four hours", "for twenty years"). Это указывает на то, как долго длится действие или состояние. В первом предложении говорится, что они работают в саду, начиная с момента, когда они пообедали. Во втором предложении говорится, что Салли живет у своей кузины, начиная с момента, когда она приехала. В третьем предложении говорится, что их друзья путешествуют уже три месяца. Аналогичные объяснения можно дать и для остальных предложений.