Without the dreams of the youth, this invention might ___for a century.
问题描述：
Without the dreams of the youth, this invention might ___for a century.
A. have been postponed B. has been postponed
C. postpone D. be postponed
答案及解释
答
考点：情态动词表推测的用法答案：A翻译：（如果）没有青年的梦想,这项发明可能会被推迟了一个世纪.解析：postpone推迟主语是this invention 这项发明,显然要用被动语态 排除Cmight 情态动词 接动词原形 排除 B表示...