题目内容：
根据下列文章,请回答题。Heart AttackThroughout the United States。andespecially in big cities and rural areas．Tens of thousands of people with heartsthat should be good________(1)to keep them alive die each year for lack ofadequate first aid．in New York City, for example。a new study has shown thatonly one person in l 00 0utside of hospitals________ (2)after the heart suddenlystops pumping(怦怦跳动)．In contrast，in Seattle，the survival________ (3)after suchheart attacks is one in five．“The difference can be traced ________ (4lthe effectiveness of the chain of survival’s，Dr．Joseph P．Ornat0。said．“Each Linkin the________ (5) must be strong Enough for many lives to be________ (6)”Thechain begins with an immediate telephone________ (7) for emergency help and thestart within four minutes of the process needed for restarting the________ (8) working。bya family member or bystander(旁观者)．1t continues with the prompt arrival—withineight ________ (9)ten minutes of a rescuer equipped with a special instrumentthat can shock the heart back to a normal rhythm．And it ends with the administration(给予，实施)ofadvanced(先进的)emergency care by nurses to maintain the heart’s ability tosurvive until the doctors at the hospitals can take________ (10)．When one ormore links in this chain fail or function too slowly, the________(11)Of avictim surviving heart attack falls rapidly．Because of widespread weaknesses inthe chain of________（12)，experts jn emergency heart care estimate that 20，00010 80，000 people________ (13)needlessly of heart attack each year, a numbercomparable to the 55,000 killed annually in automobile ________ (14)．
One expert says，“Sending an emergencyvehicle to a heart attack victim ________ (15)the special equipment is likehaving policemen with guns but no bullets．They may put on a good show, but theylack the weapon needed to get the job done．” A．enough
B．much
C．many
D．too
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