—Ted’s flight from Amsterdam took more than 11 hours. He _____ be very tired after such a long trip. —Yes, especially after working all night before the flight. 2. _____ there is still a long way to go, we believe that the doctor-patient relationship in China is gradually improving. 3. A new engineer was appointed to deal with the products _____ by customers. A. returning B. returned C. to return D. return 4. Astronomers have discovered that three planets have sizes and temperatures similar to _____ of Earth. 5. —Honey, shall we adopt a dog? —Adopting a pet depends on _____ we have the ability to care for it. Actually, we are so busy. 6. _____ your strengths and weaknesses will help you achieve your dreams. 7. —Mom, is Dad coming to pick us up? —Yes, I am sure he _____ on the platform when we pull into the station. 8. With a science project _____, Kevin spent his entire weekend in the library. 9. The moment _____ I learned the results of the competition was one of the happiest times in my life. 10. Last year, every employee in our company _____ a physical examination free of charge. 11. —It’s so convenient to use cell phones to pay the subway fare. —Yes. _____ thought of the idea is really brilliant. 12. Upon arriving home, Lily found that her husband _____ a beautiful candlelight dinner. 13. When _____, the new bridge will reduce travel time between the two cities from two hours to thirty minutes. 14. If it had not been for the kind guide, we _____ our way in the mountains. 15. —By the time we _____ to the movie theater, the tickets may be sold out. —Don’t worry. I told Jane we might be late and she will buy our tickets.