Chuyển các câu dưới thành câu kép

Dưới đây là các câu kép: 1. As she gets older, she becomes thoughtful. Câu kép: She gets older, and she becomes thoughtful. 2. If she practices frequently, she will become a strong athlete. Câu kép: She will become a strong athlete if she practices frequently. 3. If they save money, they can afford nice vacations. Câu kép: They can afford nice vacations if they save money. 4. As I exercise frequently, I feel healthy. Câu kép: I exercise frequently, so I feel healthy. 5. If he speaks fluently, he will gain confidence. Câu kép: He will gain confidence if he speaks fluently. 6. If they work longer hours, they earn higher salaries. Câu kép: They earn higher salaries if they work longer hours. 7. If she studies more diligently, she will achieve better results. Câu kép: She will achieve better results if she studies more diligently. 8. If he practices regularly, he can improve his skills. Câu kép: He can improve his skills if he practices regularly. 9. If they run faster, they will win more races. Câu kép: They will win more races if they run faster. 10. As I read more books, I expand my knowledge. Câu kép: I read more books, and I expand my knowledge. 11. If she studies efficiently, she will comprehend complex concepts well. Câu kép: She will comprehend complex concepts well if she studies efficiently. 12. If he exercises hard, he will gain muscle mass. Câu kép: He will gain muscle mass if he exercises hard. 13. As they collaborate effectively, they produce high-quality work. Câu kép: They collaborate effectively, so they produce high-quality work. 14. If she manages her time strategically, she will achieve great productivity. Câu kép: She will achieve great productivity if she manages her time strategically. 15. If he invests wisely, he will earn great financial returns. Câu kép: He will earn great financial returns if he invests wisely.