单选题:阅读下列材料,回答第题:What may be the cause of a shortage of skilled a 题目分类:英语四级 题目类型:单选题 号外号外:注册会员即送体验阅读点! 题目内容: 阅读下列材料,回答第题:What may be the cause of a shortage of skilled and knowledgeable employees in the future? 参考答案: 答案解析: