（fail）　 Three quarters of people with severe heart__________ wil

（fail）　 Three quarters of people with severe heart__________ will not live beyond five years.
【正确答案】：failure
【题目解析】：构词知识题。空格处前面是形容词severe和名词heart，后面是助动词will，显然空格处要填一个名词作主语。fail是动词，变为名词需要添加名词后缀-ure，因此正确答案是failure，表示“障碍；问题”。