11. ____________ program has been developed up to this date, but none of them are economical enough to be carried out now.
A. All B. Several C. Either D. Many a
12.__________ only a few politicians took part in the opening ceremony of an international conference will be a great issue for newspapers tomorrow.
A. That B. What C. Where D. When
13. _________ the fact that the old cars could not go as fast as modern ones, people still watched the race with a great deal of pleasure and excitement.
A. Thanks to B. Despite C. As far as D. Although
14. The engineer has spent one year working in the United States and discovered how things ___________ overseas.
A. manage B. promote C. operate D. transform
15. This old dictionary has been of great _____________ in helping me to learn the English language.
A. usefulness B. value C. price D. cost
16. Much to her delight, three ______________ neighbo rs showed up and several of them even brought with them some candies and cookies.
A. dozen B. dozen of C. dozens D. dozens of
17. _____________ the ability to speak, so he had to communicate with his friends and family by using sign language.
A. As he lost B. He lost C. Having lost D. His being lost
18. With so many life’s challenges __________, the injured soldier was lucky to have a trained dog around to provide support.
A. overcame B. overcoming C. to overcome D. being overcome
19. A recent research indicates that __________ when they are greatly encouraged by their parents, will the kids improve their ability of dealing with problems.
only B. just C. Still D. yet
20. Dry stone walls, when properly __________, will last several lifetimes.
A. is built B. building C. to build D. built
参考答案：
1. B 2. A 3. D 4. A5. D
6. C 7. C 8. B 9. A 10. B
11. D 12. A 13. B 14. C 15.B
16. A 17. B 18. C 19. A 20. D
