59. If children were not told and shown how to __________ politely, they might grow up rough and rude like savages (野人).
A. blame B. behave C. betray D. bow
58. Many people ask the government to make laws to _________ smoking in public places.
A. ban B. benefit C. limit D. permit
57. Letterboxes are much more _________ in the UK than in the US, where most people have a mailbox instead. (06浙江)
A. common B. normal C. ordinary D. bare
56. I don’t like winter, because I hate to wear _________ clothes.
A. casual B. comfortable C. changeable D. clumsy
55. It’s believed that the two accidents are ________ related to each other.
A. closely B. close C. commonly D. deeply
54. With the development of West China, many technicians are _________ needed there in recent years.
A. cautiously B. casually C. badly D. barely
53. The weather here is too _______ and it can rain at any moment. Why not bring an umbrella?
A. comfortable B. consistent C. changeable D. bitter
52. The job is __________ to me because I have little experience. However, it is also rewarding.
A. challenging B. boring C. bitter D. contradictory
51. Wait till you are more ________. It's better to be sure than sorry.
A. cautious B. confident C. calm D. certain
50. They are ____ investors who always make thorough investigations (调查) both on local and international markets before making an investment.
A. common B. complex C. cautious D. confident