完型填空

An adult giraffe's head

（pump,system,unusually,double,wonder,terrible,another,down,rush,plowing,swollen,what,turns,tissues,much,animals,whenever,carries,up,keep）

Before the 20th century

（means,replaced,nearly,trip,buy,recently,to,improving,average,faster,purchasing,part,proportionally,income,cost,months,superior,influence,so,keeping）

--Every year more than

（common,ranks,operation,reviewing,led,receiving,advantage,risk,terribly,hearing,outweigh,for,with,cheaper,whose,benefits,inappropriate,while,protest,successfully）

--For the past two years

（involving,least,frank,on,presented,made,case,about,whether,dissatisfied,discouraged,voices,give,shouldn’t,avoid,Once,discuss,not,required,only）

In a telephone survey

（additional,which,virtually,taught,they,on,altered,motion,what,across,while,by,with,student’s,exist,personal,in,specific,likely,correct）

Many people wrongly believe

（hands,grown,regular,imaginary,that,how,average,Moreover,ago,share,people,could,interviewed,on,obligation,make,someone,dependent,mutually,involved）

More than forty thousand readers

（of,return,with,expectations,appears,individual,bind,law,play,other,feelings,between,issue,confirm,central,look,most,who,conclusion,however）

Reading involves looking at graphic

（substantially,defining,Although,involves,functions,about,view,for,contend,inexplicably,interpreting,according,actually,entirety,classified,conclusive,unlock,purposes,so,In）

--To be a good teacher, you need some

（hold,clear,pleasing,act,Observe,behind,arms,hear,changing,talking,mean,well,differences,same,even,fixed,natural,works,class,invent）

Today, most countries in the world

（to,means,waterways,between,exposed,voyage,located,drain,irrigate,furnish,depends,pass,below,observed,number,because,that,certain,taken,discover）