Dưới đây là các lỗi trong các câu bạn đã đưa ra: 1. "One of the sad moments of the cruise was saving goobye to Mel, who had sailed with us since we had set sail but whose health problems forced him to leave us at Lagos." Lỗi: "saving goobye" nên được sửa thành "saying goodbye". 2. "He was in a great hurry and had no time to think it over. Otherwise, he had found another way out." Lỗi: "Otherwise, he had found another way out" nên được sửa thành "Otherwise, he would have found another way out". 3. "Why didn't you come to see us when we are having lunch ?" Lỗi: "are having" nên được sửa thành "were having". 4. "As soon as the next lesson has finished, we leave." Lỗi: "has finished" nên được sửa thành "finishes". 5. "At 8 o'clock this evening my friends and I will have watched a famous film at the cinema." Lỗi: "will have watched" nên được sửa thành "will be watching". 6. "John won't be finishing the study by July because he has some health problems." Lỗi: "won't be finishing" nên được sửa thành "won't finish". 7. "The lung cancer mortality rate rose six-fold in males when mass media started covering the beach risks of smoking." Lỗi: "beach risks" nên được sửa thành "health risks".