第20题: [单项选择]We made plans for a visit, but ______ difficulties with ear prevented it. A. subordinate B. succeed C. successive D. subsequent 参考答案:D 答案解析:subsequent随后的,后来的。句意:我们制定了出访计划,但由于后来车子出了毛病,未能出访。subordinate次要的,从属的;succeed成功,接替;successive相继的,接连的。