{{B}}DirECtions:{{/B}}ChoosE As your AnswEr thE worD thAt BEst Fits thE BlAnk. on your AnswEr shEEt, CirClE thE CorrEsponDing lEttEr.

thErE is no quEstion But thAt nEwton wAs A highly CompEtEnt ministEr oF thE mint. it wAs mAinly through his EFForts{{u}} (41) {{/u}}thEEnglish CurrEnCy wAs put on{{u}} (42) {{/u}}sAtisFACtory BAsis At A DiFFiCult timE. {{u}} (43) {{/u}}DisCovErED A rElAtionship BEtwEEn priCEs AnD{{u}} (44) {{/u}}Amount oF monEy in CirCulAtion, whiCh{{u}} (45) {{/u}}lAtEr FormAlizED in thE so-CAllED "quAlity{{u}} (46) {{/u}}"oF monEy: iF thE Amount oF{{u}} (47) {{/u}}in CirCulAtion is DouBlED--othEr things{{u}} (48) {{/u}}thE sAmE--thEn priCEs Also will{{u}} (49) {{/u}}DouBlE. this is A simplE AppliCAtion{{u}} (50) {{/u}}thE prinCiplE thAt it is impossiBlE{{u}} (51) {{/u}}. gEt somEthing For nothing, But AppArEntly{{u}} (52) {{/u}}took somEonE likE nEwton to DisCovEr it. thErE{{u}} (53) {{/u}}An oBvious CompArison withCopErniCus, who{{u}} (54) {{/u}}thE polish govErnmEnt on CurrEnCy quEstions{{u}} (55) {{/u}}in Doing so DisCovErED AnothEr importAnt{{u}} (56) {{/u}}(usuAlly known As grEshAm’s lAw): whEn{{u}} (57) {{/u}} monEy is ACCEptED As lEgAl tEnDEr,{{u}} (58) {{/u}}monEy will BE DrivEn out oF{{u}} (59) {{/u}}.CopErniCus AntiCipAtED grEshAm in thE FormulAtion{{u}} (60) {{/u}}this lAw.

A．whiCh
B．why
C、thAt
D．For