Last year,France recorded just 31 cases of the mad cow disease.The rising numbers are in part __1_ a new testing program that focuses on cows that are most __2_.That program has __3_ 39 cases.But still 60 new cases were identified in the usual way,_4__ were found in 1999.Many scientists __5_ that this year,five years after safety precautions were__6_,the number od cases would be __7_.
　　The rise in cases has __8_ some scientists to question whether the disease can be transmitted in ways not yet understood.Scientists are still __9_ by the disease,first recognized in cows in 1986.
　　It appears that it is not casused by a bacteria,virus or fungus,but __10_ infectious particles called prison,perhaps __11_ a virus or other agent.The desease kills cells in the brain,__12_ it spongy and full of holes.
　　France has taken more steps to __13_ safety than most European countries,__14_ refusing to take English beef __15_ the European Union.But some scientists believe that France has not been __16_ in imposing the ban on feed that __17_ animal parts.
　　Some French officials hope that the sudden interest in mad cow disease will mean that French consumers will become educated about it,thereby recognizing that French beef is actually __18_ controlled.Every cow is given a passport at birth ,and extensive information about is parentage and __19_ it was raised must be __20_ to any slaughterhouse.When a diseased animal is found,the nentire herd is destroyed.
　　1) A as B because C since D due to
　　2) A at risk B in risk C risking D at danger
　　3) A identifiedB invented C discovered D disclosed
　　4) A more B far more C far more than D less than
　　5) A expect B expected C have expected D had expected
　　6) A put to place B put a place C put in place D put in the place
　　7) A declining B inclining C increasingD reclaiming
　　8) A attempted B prompted C lured D intended
　　9) A puzzling B puzzled C being puzzled D to be puzzled
　　10) A sterm from B developed in C grew out of D generated from
　　11) A grew with B agree with C coincide with D in concert with
　　12) A to leave B leaving C leaves D left
　　13) A be sure B ensure C make sure D assure
　　14) A includingB excluding C containing D enclosing
　　15) A abiding by B in defiance of C according toD in accordance with
　　16) A effectiveB efficient C affective D affect
　　17) A containsB consists ofC is made from D is made up
　　18) A stiff B rigidly C hard D roughly
　　19) A where B how C when D why
　　20) A subjected B submitted C reported D registered
　　参考答案:
　　1--5 DAACD 6--10 CABBA 11--15 ADBBA 16--20 AABAB