四六级：四级词汇课堂笔记第六课_大学英语单词

　　46. _A_ the calculation is right scientists can never be sure that they have included all variables and modeled them accurately.

　　A Even if B As far as C If only D So long as

　　even if 即使，即便; so long as (后面加句子时)只要。

　　47. My train arrives in New York at eight oclock tonight. The plane I would like to take from there _B_ by then.

　　A would leave B will have left C has left D had left

　　将来完成时：will have + 动词过去分词。

　　49. Harry was _A_ by a bee when he was collecting the honey.

　　A stung B stuck C bitten D scratched

　　sting v. (蜜蜂)叮，蛰; bite v. (蚊子等)咬; scratch vt. 抓伤，划破(通常指猫抓人)。

　　once bitten, twice shy. 一朝被蛇咬，十年怕井绳。

　　50. The thief tried to open the locked door but _B_.

　　A in no way B in vain C without effect D at a loss

　　in vain 徒劳，白费工夫; But很少与介词without联用; at a loss 不知所措。

　　52. _B_ seeing the damage he had done, the child felt ashamed.

　　A By B On C At D For

　　on后面加动词ing形式表示在之后这个时间概念。

　　54. Research findings show we spend about two hours dreaming every night, no matter what we _C_ during the day.

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