第18题: [单项选择]The percentage of remarriage among divorced Americans is ________. A. fifty percent B. eighty percent C. forty percent D. ninety percent 参考答案:B 答案解析:细节题。见第一自然段第三句。文中说在离婚的五个人中四个人不会一直单身,即再婚的比例应是80%。
第29题: [单项选择]Since the ______ of human history, human beings have been asking questions like "What is the essence of life" A. dusk B. dust C. twinkle D. dawn 参考答案:D 答案解析:本题考点为名词的上下文搭配辨析。dawn黎明,拂晓,开始,发端,如:the dawn of intelligence智力的开端。根据题意,选项D为正确答案。