----- Nội dung ảnh ----- 1. Jerry didn't understand the lesson. He didn't answer. 2. Carol didn't answer the telephone because she was studying. 3. Because he didn't study hard enough, he failed in the exam. 4. I was stuck in the traffic jam, and that's why I came late. 5. He had the flu because he went out in the rain last night. 6. John didn't find the money. He didn't return it. 7. I didn't know you were there. I didn't call you. 8. The heavy rain prevented everybody from going out. 9. Jimmy lent me the money. Otherwise, I would have gone out with business.
