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课后限时自测(十四)Ⅰ.语法填空 In ancient times，many people believed the earth was a flat disc.Well over 2，000 years ago，the ancient Greek philosophers were able to put forward two good arguments__1__(prove)that it was not.Direct observations of heavenly bodies were the basis of both these__2__(argue)． First，the Greeks knew that during eclipses (月食)of the moon the earth was__3__the sun and the moon，and they__4__(see) that during these eclipses，the earth's shadow on the moon was always round，they realized that this could be true only__5__the earth was spherical( 球形的)．If the earth was a flat disc，then__6__shadow during eclipses would not be a prefect circle; it would be stretched out__7__a long ellipse (椭圆)． The second argument was based on__8__the Greeks saw during their travels.They noticed that the North Star appeared lower in__9__sky when they traveled south，in the more northerly regions，the North Star appeared to be much__10__(high)in the sky. 【语篇解读】 本文主要讲述了古希腊哲学家很早就认识到地球是球形而不是平的。 1．proving 现在分词短语作定语。 2．arguments 名词作宾语，由these可知是复数。 3．between 根据后面的and可知。 4．saw 由上下文可知用一般过去时。 5．if 根据前后句的条件关系可知，if引导条件从句。 | 
