第二节  完形填空（共20小题；每小题1.5分，满分30分）

       阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出最佳选项。

     In about 250 BC, the Greek scientist Archimedes was asked by King Hieron to

find out if his crown was__21__ gold . Archimedes thought and thought about the problem

Suddenly the answer__22__ to him when he was having a bath .

As he got into the bath .Archimedes __23__ that if he immersed (浸入)the king’s crown in a vessel __24__ to the brim (边缘) with water, it would cause some water to __25__ .If he then immersed a piece of pure gold of the same __26__ as this crown, the same amount of water would overflow if the crown was pure gold . __27__ this way , Archimedes found that the crown __28__ pure gold.

           He is believed to have rushed naked (赤裸) from his bath into the __29__shouting , “ Eureka ! ” , __30__means, “ I’ve found it !” Archimedes made many important scientific discoveries, __31__pulleys (滑轮) ,and he first explained__32__things float.

          A __33__-word code was sent from Kissinger (基辛格) to Nixon（尼克松）, “ Eureka” , meaning that the trip had been __34__.After returning from Beijing ,Kissinger and his assistant wrote a __35__ to Nixon, “We have the __36__work for you and Mao to turn a page in __37__.” On July 15 Nixon informed stunned (震惊的) television viewers of Kissinger’s __38__ trip and his own plan to visit China some time before May 1972. In October 1971, Kissinger returned to __39__, with a team of “ advance men”, to __40__ for Nixon’s own visit.

   21 A special           B true            C simple          D pure 

   22 A hit              B came           C passed          D belonged

   23 A realized          B said            C remarked        D knew 

   24 A filled            B full             C exact           D perfect

   25 A freeze           B overflow         C fall             D lose 

   26 A weight           B size             C length          D shape

   27 A On              B In              C By             D At

   28 A was not          B was hardly        C was nearly      D was almost

   29 A bathroom         B waiting-room     C bedroom        D street

   30 A when            B what             C that            D which

   31 A regarding         B supposing        C including       D considering

   32 A how             B where            C why           D when

   33 A one              B double           C three           D four

   34 A successful         B necessary         C secret         D public

   35 A letter             B report            C note           D notice

   36 A result            B ground            C full            D terrible

   37 A world            B country         C history         D century

   38 A secret            B tiring           C helpful         D dangerous

   39 A China            B U.S            C his hometown   D Greece

   40 A prepare           B wait            C send          D look