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You _________ be right, but I don’t think you are.

A. can                          B. could                        C. must                        D. should

B


解析:

 从语境上看,C、D不宜选,在剩下的A和B中,许多同学想当然地选了A,认为整个句子为现在时态,所以选can,而不选过去式 could,但是最佳答案却是B而不是A。按照英语语法,情态动词can 用于推测表示可能性时,通常只用于否定句或疑问句中,而不用于肯定句中;但 could 用于表推测时,却不 仅可用于否定句和疑问句,也可用于肯定句,且此时的 could 并不是 can 的过去式,与 can 也没有时间上的差别,只 是 could 比 can语气更委婉,所以答案选B。注:can 在以下特殊情况下,也可用于肯定 句。一是表示抽象的可能性,即从理论上或逻辑上分析是可能的,但是实际上未必会发生。如:Anyone can make mistakes. 任何人都可能会犯错误。二是后接“be (get, seem, become)+形容词”,表示“有时会”、“时常会”等。如:My father can be very unreasonable. 我父亲有时候很不讲道理。

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Careercast.com is out with its list of best and worst jobs of 2012. It’s bad news for the writer of this story, but much brighter for the folks who program the code that keeps this website busy.
Using a method that looked at physical demands, work environment, income, stress and hiring outlook, career Website Careercast.com, ranked the top 200 jobs. They also ranked the jobs with the most stress. Not surprisingly, none of the most stressful jobs show up on the best jobs list.
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Best Jobs                     Worst Jobs             Most Stressful Jobs
Software Engineer                   Lumberjack              Enlisted Soldier
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B
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A. he has spent several years learning how to do his job

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A. well-educated people are prepared to emigrate whenever they can get a better paid job

B. people with jobs or responsibility expect to be highly paid

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B. we should pay people according to their talents

C. market forces will determine how much a person is paid

D. qualified people should be the highest paid

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