题目内容
10．-You are required by law________seat belts．-Thanks for your reminding．I'll do it right away．（ ）
| A． | wearing | B． | being worn | C． | to wear | D． | to be worn |
分析 --法律要求系好安全带．
--谢谢你的提醒，我马上就系好安全带．
解答 答案：C
解析：require sb to do sth 意为"要求某人做某事"，而根据句意及横线前面的be动词are可知本题使用的是其被动语态结构be required to do sth"被要求做某事"；故结合所给选项分析可知，本题答案为C选项．
点评 本题考查动词不定式，做此类题目时要仔细分析句子结构，确定所缺成分及该由什么来充当此成分；再结合选项选出正确答案．
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20．For hundreds of years，people dreamed of being able to fly．Many of the early attempts at flight seem humorous today：people built wings and jumped off （41）C buildings，or tried to sh oot themselves （42）Bthe air with rockets．But all attempts were unsuccessful （43）Atwo French brothers thought of a new way，using（44）B．They believed that if balloons were filled with hot air，they would （45）B．They built a very large balloon and （46）Dthe air in it until the balloon （47）C a height of 1，800 metres．Then the air in the balloon cooled before the balloon slowly sank back to the ground．
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| 41．A．old | B．large | C．high | D．wooden |
| 42．A．by | B．into | C．with | D．to |
| 43．A．until | B．for | C．unless | D．though |
| 44．A．rockets | B．balloons | C．planes | D．fires |
| 45．A．explode | B．rise | C．fire | D．expand |
| 46．A．blew | B．found | C．filled | D．heated |
| 47．A．arrived | B．became | C．reached | D．raised |
| 48．A．abroad | B．aboard | C．broad | D．board |
| 49．A．returned | B．touched | C．succeeded | D．tried |
| 50．A．ready | B．willing | C．disappointed | D．lucky |
| 51．A．however | B．thus | C．but | D．even |
| 52．A．ago | B．later | C．after | D．before |
| 53．A．as | B．though | C．when | D．while |
| 54．A．forced | B．encouraged | C．surprised | D．refused |
| 55．A．such that | B．so as | C．as if | D．even though |
| 56．A．used to | B．were used to | C．got used to | D．were used for |
| 57．A．formed | B．produced | C．made | D．called |
| 58．A．powered | B．equipped | C．furnished | D．decorated |
| 59．A．set fire | B．be on fire | C．catch fire | D．be in fire |
| 60．A．an end to | B．benefit from | C．result of | D．consequence for |